Rullmann’s “Map of Bexar County” shows the county’s current borders, established after the creation of Wilson County in 1860. His work identified all the original land grants issued in Bexar County; given its location, the map includes nearly every type of grant, from Spain, Mexico, the Republic and State of Texas. The map also indicates the various railway lines in the county as well as the different ranges and lots within the San Antonio town tract.