Author David R. Butler is the Texas State University System Regents' Professor of Geography and a University Distinguished Professor at Texas State University in San Marcos, Texas. He has been on the faculty of Texas State University since 1997. The historical photographs for San Marcos were provided by Texas State University; the San Marcos Public Library; the Lyndon B. Johnson Presidential Library in Austin, Texas; the Lyndon B. Johnson Museum of San Marcos; and other private collections.