From the record
“Rancho Estelle was the home of James Sublett, one of the first large-scale farmers in the Rio Grande valley of Texas, within what is now Big Bend National Park. Prior to founding the ranch, Sublett and his partner, Clyde Buttrill, farmed the bottomlands along the river in the area of what is now known as Castolon or La Harmonia, downstream from the later ranch.”
Wikipedia article Rancho Estelle, CC BY-SA 4.0.
One of 14 National Register listings published here for Brewster County · listed in 1974 · category: District.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service

