4 Publications by Frederick Keppel and Co.- 1.) ''The Keppel Booklets''- First Series, 1907, boxed set of 6 including ''Drypoints by Paul Helleu, ''Jean-Francois Millet'' by Mrs. Schuyler Von Renaselaer, ''Charles Meryon'' by Frederick Keppel, ''The Late Felix Buhot Painter-Etcher'' by M. Leonce Benedite, and ''August Raffet'' by Atherton Curtis; 2.) ''Mr. Pennell's Etchings of London / Mr. Keppel as a Painter''- 1905; 3.) ''Mr. Pennell's Etchings of New York Skyscrapers''- 1906; 4.) ''How Prints are Made'' by Atherton Curtis (2nd ed. revised), 1907.