" I found an ancestor is mentioned in the AGBI. I am not exactly sure what that means? Do I need to look it up in the index to find what other source it points to?"
The AGBI is the American Genealogical Biographical Index. Back when I started doing genealogy research (not really the dark ages...), it was one of the most important resources to use to find published information about a person. The AGBI provided a reference for specific books or periodicals for a specific name. The Ancestry.com description of the AGBI reads:
"One of the most important genealogical collections, the American Genealogical-Biographical Index, or AGBI, is the equivalent of more than 200 printed volumes. This database contains millions of records of people whose names have appeared in printed genealogical records and family histories. With data from sources largely from the last century, each entry contains the person's complete name, the year of the biography's publication, the person's state of birth (if known), abbreviated biographical data, and the book and page number of the original reference. In addition to family histories, other genealogical collections are indexed. These include the Boston Transcript (a genealogical column widely circulated), the complete 1790 U.S. Federal Census, and published Revolutionary War records. The most recent update to this database reflects the inclusion of volumes 196-206. For researchers of American ancestors, this can be one of the most valuable databases available at Ancestry.com.
"Most of the works referenced in the AGBI are housed at the Godfrey Memorial Library in Connecticut. A photocopy service is available. Please contact Godfrey Memorial Library at 134 Newfield St, Middletown, CT 06457 or via e-mail at firstname.lastname@example.org to make use of this service.
"To learn more about the AGBI, read the extended description below, but also read Kory Meyerink's article 'Genealogy's Best-kept Secret: American Genealogical-Biographical Index.' "
The AGBI is available on the Godfrey Memorial Library site, www.godfrey.org, and on www.Ancestry.com, both subscription sites. Using Ancestry.com's database, I used the AGBI collection to search for one of my ancestors, Burgess Metcalf. Here is the search screen:
The results page shows three specific items for Burgess Metcalf (and 14 matches for other people because I have my search set to include initials):
The first match is shown below:
This match refers to the citation in AGBI is in Volume 117, page 91. "miscellaneous Rev. docs. Of NH. Ed. By Albert Sillman Batchellor. Manchester, NH, 1910. (17,658p.):112 Rev.War Recds:N.H: 2:384; 3:924." I must admit that I have not seen this record before, and it might be helpful to provide more detail about Burgess Metcalf's military career.
This match references "Stat of Vt: Rolls of the soldiers in the Rev. War, 1775-1783. By John E. Goodrich. Rutland, Vt. 1904. (22,2,927p.):23." I have not seen this record before, either.