Underwood & Underwood

"Underwood & Underwood was an early producer and distributor of stereoscopic and other photographic images, and later was a pioneer in the field of news bureau photography. The company was founded in 1881 in Ottawa, Kansas, by two brothers, Elmer Underwood (born Fulton County, Illinois 1859 - died St. Petersburg, Florida 1947) and Bert Elias Underwood (born in Oxford, Illinois 1862 - died Tucson, Arizona 1943).[1] They moved to Baltimore and then to New York City in 1891.[2] At one time, Underwood & Underwood was the largest publisher of stereoviews in the world, producing 10 million views a year...The company ceased business in the 1940s."--Wikipedia