1927 Map of Pearsall

About this map

The Frio River valley south of Pearsall is defined by a dense network of braided channels and seasonal tributaries that shaped the settlement of Frio County in the 1920s. The village of Derby serves as the primary focal point of the eastern half, situated along the corridor of the International Great Northern railroad. This rail line provided a critical link for the transport of livestock and agricultural goods, paralleling the river systems that drain the landscape. To the west, the terrain is marked by the convergences of Hondo Creek, Palo Blanco Creek, and the Leona River. The eastern third of this sheet is designated as an Unsurveyed Area, leaving a stark contrast between the detailed topography of the river basins and the unmapped plains to the east, illustrating the limits of early twentieth-century geodetic field work in South Texas.