found: Cooper, J.F. O-i-chee, 1865:t.p. (Irwin P. Beadle, publisher)
found: Johannsen, A. The house of Beadle and Adams, 1950:p. 50 (firm of Irwin P. Beadle with no "and Company" established in 1865; firm's novels copyrighted by Irwin P. Beadle & Co., although firm's name apparently never took that form on title page or in advertisements)
found: MWA/NAIP files(hdg.: Irwin P. Beadle (Firm); usage: Irwin P. Beadle; variant: Irwin P. Beadle & Co.; note: N.Y.C. publishing firm established 1865 by Irwin P. Beadle; previously Beadle and George Munro partners in firm of Irwin P. Beadle & Co. (1862-1864); July 1866 the name was changed to Irwin & Co.)