found: Herrings's (i.e., Herring's) soaring aeroplane [graphic] c1894:photo mounts (Geo. P. Hall & Son, general photographers, 157 Fulton St. & 303 Broadway, New York)
found: George Eastman House database, 7-5-02(Hall, George P. & Son, active 1880s-1910s; a partnership of George P. Hall and his son James S. Hall; after his father's death in 1900, James Hall continued to operate the firm)
found: A guide to print, photograph, architecture & emphemera at the New-York Historical Society, 1998:p. 82 (Geo. P. Hall & Son; commercial photography firm founded by George P. Hall (1832-1900) ca. 1875; his son, James S. Hall continued the firm until about 1911)
found: Eureka RLG Union catalog, 7-5-02(hdg.: George P. Hall & Son)
