The Edward H. Cahill Papers contains a copy of a map of part of the Virginia Polytechnic Institute campus drawn by Cahill in 1909, materials from his professional life, and a memorial address in which he is cited, "The Brock Brothers and the Brock Process," by Harry Tubis. There is a photograph of Cahill standing in front of the camera he invented and patented and a speech he gave in 1939 on "The Colorado River Aqueduct and California District It Serves." It also includes three obituaries.