I found a great new source of Siegel Cooper photos and advertisements at the NYPL Digital Gallery. NYPL Digital Gallery provides access to over 415,000 images digitized from primary sources and printed rarities in the collections of The New York Public Library, including illuminated manuscripts, historical maps, vintage posters, rare prints and photographs, illustrated books, printed ephemera, and more.

Women reading, April 30, 1910, Siegel-Cooper Company.

(via NYPL’s Best of the Web)