- George Lewis homestead near Gridley, California. (Photo courtesy of L. Philip Reiss, grandson of W. Lee Lewis)
- West Liberty School, Gridley, California. W. Lee Lewis is in the front row on the left. (Photo courtesy of L. Philip Reiss, grandson of W. Lee Lewis)
- Faculty baseball team at Morningside College in Sioux City, Iowa. W. Lee Lewis is 3rd from the right. (Photo courtesy of L. Philip Reiss, grandson of W. Lee Lewis)
- W. Lee Lewis, sitting at center, with chemistry students at Morningside College, Sioux City, Iowa, in 1905. (Photo courtesy of L. Philip Reiss, grandson of W. Lee Lewis)
- W. Lee Lewis teaching chemistry class at Morningside College, 1905. Myrtilla Cook, his future wife, is seated in the last row. second from right. (Photo courtesy of L. Philip Reiss, grandson of W. Lee Lewis)
- W. Lee Lewis in uniform, photographed prior to departure to Washington, DC, to work at the American University Experiment Station. (Photo courtesy of L. Philip Reiss, grandson of W. Lee Lewis)
- Official photo of W. Lee Lewis. (Photo courtesy of L. Philip Reiss, grandson of W. Lee Lewis)
- Maloney Lab at Catholic University, Washington, DC. Catholic, like American University, turned over its campus to the federal government during the war. Lewis, dissatisfied with conditions at American, decamped to Catholic, where Organic Unit #3 discovered the chemical compound that would become known as lewisite. (Photo courtesy of L. Philip Reiss, grandson of W. Lee Lewis)
- Enlisted men at Catholic University in 1918. (Photo courtesy of L. Philip Reiss, grandson of W. Lee Lewis)
- Enlisted men drilling at at Catholic University in 1918. (Photo courtesy of L. Philip Reiss, grandson of W. Lee Lewis)
- Organic Unit #3 at Maloney Hall at Catholic University. This photo was probably taken after the discovery of lewisite. (Photo courtesy of L. Philip Reiss, grandson of W. Lee Lewis)
- Small scale experimental apparatus for creating lewisite, on the roof of Maloney Lab. The experiments with lewisite proved so dangerous and the substance so toxic that experiments were moved outdoors for safety reasons. (Photo courtesy of L. Philip Reiss, grandson of W. Lee Lewis)
- New York Times article about lewisite from April 20, 1919, entitled "Our Super-Poison Gas: First Story of Compound 72 Times More Deadly than "Mustard," Manufactured Secretly by the Thousands of Tons."
- Photo of W. Lee Lewis in 1937. Lewis died in 1943. (Photo courtesy of L. Philip Reiss, grandson of W. Lee Lewis)