Exceedingly rare vintage black fountain pen signature on a roughly 2 x 2.5-inch portion of a tan birthday book leaf, acquired in-person in the 1910s and affixed by a previous owner to an 8.5 x 11-inch sheet of white cardstock beneath two computer-printed images of the star. In good condition. Veteran character actress Beryl Mercer, who was the wife of Holmes Herbert, played a mixture of maternal and stately types in films like Three Live Ghosts (1929), All Quiet on the Western Front (1930), The Public Enemy (1931), Supernatural (1933), Berkeley Square (1933), Jane Eyre (1934), The Little Minister (1934), Magnificent Obsession (1935), Three Live Ghosts (1936), Night Must Fall (1937), The Little Princess (1939), The Hound of the Baskervilles (1939), and The Story of Alexander Graham Bell (1939).