VIAF: http://viaf.org/viaf/153268844
Major American photographic image producer and distributor, founded in 1892 in Meadville, Pennsylvania by B. L. Singley, an amateur photographer. The company was at its most prosperous in the 1930s. It was purchased in 1963 by the Mast Development Company, when lantern slides were becoming obsolete as a market.
Getty ULAN: http://vocab.getty.edu/page/ulan/500450247