"Solid as a Rock," no author noted, Chamber of Commerce of Harrison County 2012, (Corydon, Indiana: O'Bannon Publishing Co., 2012), p. 10-11. NOTE: The information noted below was abstracted by Randi Richardson from an article that is copyright protected. The article is accompanied by three photographs. In 1947, William Robertson bought the land that is now Robertson Crush Stone from the Speed family. In the early 1960s, the land was leased to Kramer and Sons, an excavating company. In the late 1970s, William's sons, Larry, Charlie and Jim, took over the quarrying business. Jim retired from the business in 2000; Larry retired in 2007. Charlie continues to run the business with his wife, Jill, and their two children, Katie and Will, both graduates of Indiana University.