"The Shadow of the Texas Rangers - late 1920's" The Texas Rangers in Fabens, Texas (a suburb of El Paso) This drawing is from an old photo my grandparents gave me. The shadows were really bad but I always loved the photo. These Texas Rangers used to board with my grand parents when they would go to the Texas/Mexico border during prohibition. My father remembers the Texas Rangers staying with them and going with his father to the edge of the Rio Grande River and leaving money under a rock. The next day someone from Mexico would wade across the river on a mule get the money and leave bottles of booze in a hole under the rock. This is where the term mule came from.