My late father, Samuel G. Hibben, was an illumination engineer who designed the lighting for several Virginia landmarks: Endless Caverns, Natural Bridge and (I think) Luray Caverns. He was then Director of Applied Lighting for the Westinghouse Co. I am writing Dr. Hibben’s biography and would like to get details on these lighting projects. Can anyone point me in the right direction? I have dates of 1927 for Natural Bridge and 1937 for Endless Caverns; I don’t have anything more on Luray. Tks, Stuart Hibben