"Interesting. You may have figured all this out by now, but I thought I'd add some observations anyway. Both of Henry A Carringer's patents are Cash Entry - I'm pretty sure that means he paid cash for them on the dates listed, and could dispose of them at will. They were definitely not Homestead patents (no 5 year occupancy, no "proving up").
"There are other Carringers, too, in Lane and Decatur Counties.
"There are two Cheyenne County patents for Della A Smith - one in Section 3 and one in Section 2 - and another in Scott County for a Della S Smith. All of them are Cash Entry.
"Devier Smith patents in Section 11 and Section 10 are both Cash Entry.
"I don't know why the patents are in Della's birth name unless she's a different Della - how likely is that??? Maybe she and Henry were trying to disguise the extent of their holdings!
"Anyway, all of these parcels could have been sold at any time.
"If you go to the Reference Center tab on the BLM site and then down to the Document Requests section, Land Entry Case Files, you'll find even more possibilities for delicious burrowing. Land research is utterly fascinating."
* Cheyenne County, Kansas, Meridian 6th PM, Township 003S, Range 040W, Section 11, Aliquots W1/2 SE1/4 and E1/2 NW1/4. This is 160 acres - the west half of the southeast quarter, and the east half of the northwest quarter of Section 11 of Township 003W, Range 40W in Cheyenne County, Kansas.