Below is a copy of a 1895 plat map for Cooke county showing land owned by several of the men who were killed during the hangings. Texas land surveys are known by the name of the person who was originally authorized to purchase the land. So if your ancestor was not the original owner of the land, you would need the land deed for your ancestor to find out the name of the survey in order to find it on a map. According to the Texas General Land Office: "for the purposes of reference the name of the original certificate holder is retained as a means of identifying the surveyed tract."
1895 Cooke County Survey Map |
The Texas General Land Office has an excellent website. Another helpful website is Arphax Publishing. The Arphax Publishing Texas Land Survey Maps series and Family Maps series are very helpful in finding the land your ancestor owned.
I will be glad to add names to the map, if information is left in comments showing which survey was owned by your 'Great Hanging' ancestor.:)
The above map can be found on Ancestry.com. It is in their map collection called Historic Land Ownership and Reference Atlases, 1507-2000. Ancestry.com is available free in most major libraries, university libraries, genealogy libraries, and in LDS Family History Centers across the U.S.