Friedrich Adolph Zimmerscheidt, Colorado District First Class File 16, Original Land Grant Collection, Archives and Records Division, Texas General Land Office, Austin; Colorado County Deed Records, Book F, p. 64; Caspar Simon, Colorado District First Class File 60, Original Land Grant Collection, Archives and Records Division, Texas General Land Office, Austin. The final Casper Simon Survey was 3043.23 acres, meaning that Elizabeth Pieper's decision not to hire another surveyor cost her nearly 1400 acres.