Using the ABC method described in Using Artificial Intelligence In the Ancestor Biography Creation (ABC) Process -- Updated, enhanced by further developments, here is another ancestor couple biography using the Anthropic Claude Sonnet 4.6 AI tool.
1) The genealogical sketch for the family of my 5th great-grandparents John and Hannah (Colby) Underhill, including family members, record abstracts and sources, is in Genealogical Sketch of the John Underhill (1745-1816) and Hannah Colby (1750-1793) Family of Chester and Plainfield, New Hampshire.
(AI NotebookLM Infographic - John and Hannah (Colby) Underhill Family Biography)
2) For the Claude AI biography, I attached a PDF of the genealogical sketch for the specific ancestors using the plus (+) icon, and then prompted the AI tool with: "You are an expert genealogist and family historian. Please create a biography based on information in the attached file for the John and Hannah (Colby) Underhill family. Include parents, siblings, spouses and children (with birth and death dates and places). Summarize life events, add historical events as appropriate, but do not add or embellish any extra genealogical details. Use section headings. Expand the information in each section to add more details. The tone should be engaging and suitable for family members."
3) The Anthropic Claude Sonnet 4.6 biography (lightly edited for accuracy) is:
The Underhill Family of Chester and Plainfield
New Hampshire, 1745–1875
A Family Biography
Introduction
Among the earliest families to shape the rugged hill towns of New Hampshire, the Underhills of Chester left a legacy woven into the very fabric of colonial and Revolutionary-era New England. This biography follows the life of Sergeant John Underhill (1745–1816), who served in the Revolutionary War, and his wife Hannah Colby (1750–1791) — a couple whose story spans the final decades of colonial rule, the turbulence of the American Revolution, and the hopeful expansion of a new nation.
From the rocky farmland of Chester, Rockingham County, to the hills of Plainfield on the Connecticut River, their lives touched some of the most dramatic events of their age. John bore a musket at the Battle of Bennington; Hannah raised six children on a family homestead; and together they built a family whose descendants spread across New England and beyond.
John Underhill (1745–1816)
Birth and Early Life
John Underhill was born on 20 June 1745 in Chester, Rockingham County, New Hampshire Colony — a time when the settlements of New Hampshire were still finding their footing on the edge of the British colonial frontier. He was the third child and second son of John Underhill (1720–1793) and Joanna Healey (1718–1809), who had married in Chester in 1741 and would go on to raise a family of ten children in that close-knit community.
Chester in the mid-eighteenth century was a thriving Scots-Irish Protestant settlement founded in 1719. Its residents were independent-minded farmers and craftsmen who prized self-sufficiency and community loyalty — values that would later lead many of them, including John, to take up arms for American independence.
John grew up in a large and lively household alongside nine siblings, several of whom remained in the Chester area throughout their lives:
- Betty Underhill (born 13 July 1742, Chester) — married Samuel Buswell in Candia on 12 July 1764; died 30 September 1806 in Candia.
- William Underhill (born 15 February 1744, Chester) — married Abigail Choate about 1767 in Candia; died 24 November 1780 in Moultonborough.
- Molly Underhill (born 4 December 1747, Chester) — married James Pierce in Chester in 1765; died 1835.
- Moses Underhill (born 2 February 1749, Chester) — married three times; died 8 February 1838 in Chester.
- David Underhill (born 9 September 1751, Chester) — married Jemima Blake in Chester on 20 September 1792; died 28 July 1827 in Chester.
- Samuel Underhill (born 5 May 1753, Chester) — married Sarah Underhill in Chester on 12 December 1775; died 20 September 1828 in Chester.
- Jeremiah Underhill (born 6 August 1755, Chester) — married Anna Heath in Hampstead in September 1775; died 16 September 1794 in Chester.
- Sarah Underhill (born 20 May 1759, Chester) — married Moses Greenough in Chester on 10 December 1789; died 7 September 1838 in Atkinson.
- Joanna Underhill (born about 1764, Chester) — married Moses Preston in Chester on 30 November 1784.
Birth and Early Life
Hannah Colby was born on 14 February 1744/5 in Amesbury, Essex County, Massachusetts Bay Colony — the dual dating reflecting the old-style Julian calendar still in use at the time of her birth. She was the fourth of five children born to Joseph Colby (1707–1768) and Abigail Worthen (1714–date unknown), who had married in Amesbury in 1736.
Amesbury in the 1740s was a prosperous Massachusetts town on the Merrimack River, well known for its mills and craftsmen. Hannah grew up there alongside her siblings before the family made the significant decision to relocate northward to Chester, New Hampshire Colony, sometime before 1760 — likely drawn by the promise of inexpensive land and opportunity on the frontier.
Hannah's parents, Joseph and Abigail (Worthen) Colby, had the following children:
- Ephraim Colby (born 6 March 1736/7, Amesbury) — died in infancy in 1737.
- Joseph Colby (born 3 April 1739, Amesbury) — married Molly [surname unknown] before 1776 in Concord, New Hampshire; died 1839 in Concord — a remarkable life spanning over a century.
- Abigail Colby (born 24 September 1742, Amesbury).
- Hannah Colby (born 14 February 1744/5, Amesbury) — the subject of this biography.
- Ephraim Colby (born 24 March 1750, Amesbury).
The Wedding and the Homestead
John Underhill and Hannah Colby married in about 1767 in Chester, Rockingham County, New Hampshire Colony. Their union brought together two well-established Chester families — the Underhills, long rooted in that community, and the Colbys, relative newcomers from Amesbury who had quickly become part of the local fabric.
The Underhill Genealogy, compiled by Josephine C. Frost, describes their home as being "near the brick school house on the opposite side of the road a little to the southwest" — a vivid detail that places the family at the heart of Chester's community life, adjacent to the very institution where the next generation would be educated.
On 2 March 1774, John and Hannah made a significant financial and emotional investment in their future: they purchased the 60-acre homestead of Hannah's late father, Joseph Colby, from her brother Joseph for £165. The property, known as Lot No. 40, sat along the Long Meadow road near the old brick school house. It was the land on which Hannah had likely grown to womanhood, and it would now become the family's base for decades to come.
Children of John Underhill and Hannah Colby
Between 1770 and 1779, John and Hannah welcomed six children into their Chester home, all born in the town where their story began:
- Joseph Underhill (born 1770, Chester) — married Mollie Carr about 1798 in Cabot, Washington County, Vermont; they had five children; died 3 September 1843 in Marshfield, Washington County, Vermont.
- Amos Underhill (born 15 April 1772, Chester) — married Mary Metcalf on 25 March 1801 in Piermont, Grafton County, New Hampshire; they had five children; died 15 October 1865 in Aurora, Erie County, New York — a long life of 93 years.
- Nancy Underhill (born 1774, Chester), no further record.
- John Underhill (born 1776, Chester) — married Mary Esther Mitchell in 1798 in Grafton, Grafton County, New Hampshire; they had three children; died 1858 in Grafton.
- Susan Underhill (born 1778, Chester), no further record.
- Jonathan Underhill (born 9 August 1779, Chester) — married Sophia Slack on 5 March 1805 in Plainfield, Sullivan County, New Hampshire; they had four children; died 31 October 1875 in Washington, Orange County, Vermont — reaching the remarkable age of 96.
John Underhill and the Revolutionary War
Service at the Battle of Bennington, 1777
John Underhill's most notable contribution to the American cause came in the summer of 1777, one of the most consequential years of the Revolutionary War. On 21 July 1777, John enlisted as a Corporal in Captain Stephen Dearborn's Company, part of Colonel Thomas Stickney's regiment under the command of General John Stark. The company marched west from Chester to join the Northern Continental Army.
The campaign that followed led John directly to the Battle of Bennington, fought on 16 August 1777 in present-day New York near the Vermont border. This pivotal engagement saw General Stark's forces decisively defeat a Hessian detachment sent by British General John Burgoyne to seize supplies at Bennington, Vermont. The victory — a stunning success for the American militia — weakened Burgoyne's army and helped set the stage for the crucial American victory at Saratoga two months later, which brought France into the war as an ally.
It was on this very day, 16 August 1777, that John Underhill was promoted from Corporal to Sergeant — a recognition of his service and leadership during the battle. He was discharged on 28 September 1777, having traveled 192 miles in service to the cause, and was paid £13 14s 8d for his efforts. From that point forward, records consistently refer to him as Sergeant John Underhill.
Service in the Coos Campaign, 1780
John's service did not end at Bennington. When the town of Chester was called upon to raise six men for six months' duty in the remote Coos region of northern New Hampshire, John Underhill was among those who answered. Under the authority of Muster Master John Webster — acting on orders from New Hampshire's Committee of Safety in Exeter — six men were enlisted to serve until the end of December 1780.
The mission required these volunteers to march approximately 100 miles north from Chester to the Haverhill area in the "Cohos" (Coos) region, the frontier edge of New Hampshire that bordered Canada. John was one of the three men entrusted with distributing travel funds to the soldiers — a sign of the trust his community placed in him. The war had long since moved south, but the northern frontier still required vigilant protection.
Later Years and Legacy
Hannah's Death and Its Aftermath
Hannah (Colby) Underhill died on 12 September 1791 in Chester, Rockingham County, New Hampshire, at 46 years of age. Her death must have been deeply felt in the household, which still contained several of the younger children. She had been the heart of the family through the years of the Revolution, through the births of six children, and through the daily labor of running a New Hampshire farm.
After Hannah's death, John continued to live in Chester for a time, spending some period in nearby Candia. The family homestead on Long Meadow road — the 78 acres (expanded from the original 60) — was eventually sold to Mary Brown in 1801 for $600.
The Move to Plainfield
With his Chester homestead sold, John Underhill made a significant move to Plainfield, then in Cheshire County, New Hampshire (later transferred to Sullivan County). On 9 June 1801, he purchased a 57-acre parcel of land in Plainfield from Nathaniel Garland for $700 — a modest but solid investment that would keep him near at least one of his sons.
His son Jonathan also settled in Plainfield, and married Sophia Slack there in March 1805. On 13 March 1806, John formally conveyed the 57-acre Plainfield property to Jonathan for $700, the same price he had paid five years earlier — likely an arrangement that ensured Jonathan and Sophia could maintain the farm while providing John a home in his final years. It is believed that John spent his remaining decade living with his son Jonathan's family.
Death of John Underhill
John Underhill died in 1816 in Plainfield, Sullivan County, New Hampshire, at the age of approximately 70 — a veteran of two stints in the Revolutionary War, a farmer, a father of seven, and a man who had lived through the transformation of his country from British colony to independent republic. According to the History of Old Chester, his death was caused by hypothermia, a stark and sorrowful end for a man who had survived battlefield service and decades of New England winters.
There are no surviving death, burial, or probate records for either John or Hannah in the counties of Rockingham or Sullivan. Their graves, if they still exist, have not been identified in any known cemetery record — a reminder of how easily even remarkable lives can slip from the written record.
The World They Lived In
To appreciate the Underhills fully, it helps to understand the world through which they moved. John was born just five years after King George's War disrupted New England, and spent his youth in the tensions leading to the French and Indian War (1754–1763). By the time he married Hannah in 1767, the Stamp Act had already inflamed colonial opinion against Britain, and the road to revolution was being paved.
When John marched to Bennington in 1777, he was part of a New Hampshire militia tradition of citizen-soldiers — farmers who set down their plows and picked up muskets to defend their communities. General Stark's victory at Bennington remains one of New Hampshire's proudest military achievements; the state motto, "Live Free or Die," derives from Stark's famous toast years after the battle.
The years of Hannah's childrearing, the 1770s and 1780s, coincided precisely with the war and its immediate aftermath — a time of sacrifice, scarcity, and hope. The family's purchase of Joseph Colby's homestead in 1774, just two years before the Declaration of Independence, placed them among those New Englanders who were simultaneously building private futures and a new public nation.
By the time John moved to Plainfield in 1801, Thomas Jefferson had just been elected president, the Louisiana Purchase was two years away, and the United States was still discovering the scale of its own ambitions. John Underhill was a man of the founding generation in every sense — born a colonial subject, transformed into a citizen, and aged into the early republic.
A Family That Spread Across New England
The children of John and Hannah Underhill carried the family outward from Chester in directions that reflect the restless mobility of early American life. Joseph, the eldest, moved to Vermont, settling in the Washington County towns of Cabot and Marshfield. Amos also went west and north — to Piermont in Grafton County, New Hampshire, and eventually to Aurora, New York, where he died in 1865 at the age of 93. John Jr. remained closer to home in Grafton, New Hampshire.
Jonathan, the youngest son, settled in Plainfield alongside his father in his final years, before his own family eventually relocated to Washington, Orange County, Vermont, where Jonathan lived until his death on 31 October 1875 — 96 remarkable years that carried him from the American Revolution to the end of the Civil War. The daughters Nancy and Susan remain less documented in available records, as was sadly common for women of their era.
Together, the children of John and Hannah Underhill produced at least seventeen known grandchildren across Vermont, New Hampshire, and New York — a family that grew with the young nation itself.
A Note on Sources
This biography draws upon several primary and secondary sources, including:
- New Hampshire Birth Records, 1659–1900 (Ancestry.com and FamilySearch)
- Josephine C. Frost, Underhill Genealogy, Volume 4 (Myron C. Taylor, 1932)
- Town of Amesbury, Massachusetts, Vital Records to the End of the Year 1849 (Topsfield Historical Society, 1913)
- Benjamin Chase, History of Old Chester From 1719 to 1869 (Auburn, N.H., 1869)
- New Hampshire Revolutionary War Records, 1675–1835 (FamilySearch and Ancestry.com)
- Cheshire County, New Hampshire Deed Records, 1801–1814 (FamilySearch)
Prepared from genealogical records of the Underhill and Colby families of Chester and Plainfield, New Hampshire.
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4) An Audio Overview (essentially a podcast) created by the Google NotebookLM AI tool) describing and celebrating the lives of the John and Hannah (Colby) Underhill family can be heard here (click on "Audio Overview" and wait for it to load).
5) The Video Overview discussing the John and Hannah (Colby) Underhill family created by the Google NotebookLM AI tool is:
6) The Slide Deck produced by Google NotebookLM was incorporated into a Google Slides file, and the created Google Vids presentation is below:
7) I edited the Claude biography text to correct minor inconsistencies and errors. Every large language model (LLM) AI tool writes descriptive text much better than I can write. I was an aerospace engineer in my former life, and my research reports and genealogical sketches reflect "just the facts gleaned from my research." The AI tools are very perceptive, insightful and create readable text in seconds, including local and national historical events and social history detail when requested.
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Links to my blog posts about using Artificial Intelligence are on my Randy's AI and Genealogy page. Links to AI information and articles about Artificial Intelligence in Genealogy by other genealogists are on my AI and Genealogy Compendium page.
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