Cassell, Petter & Galpin
LC Name Authority record no.: nr99039236
LC Heading: Cassell, Petter & Galpin
From http://id.loc.gov/authorities/names/nr99039236 (accessed on 7/11/2017 by S. Salvaggio):
The house of Cassell, 1848-1958, 1958: pages 52-57 (June, 1855: printing firm Petter & Galpin take over publishing firm founded by John Cassell; Dec. 1858: Cassell readmitted into partnership; new imprint: Cassell, Petter & Galpin) page 87 (used style Cassell, Petter, Galpin & Company from 1878 to 1883)
From http://id.loc.gov/authorities/names/nr99031535 (accessed on 7/11/2017 by S. Salvaggio):
British literary publishing houses, 1820-1880 (Dict. of literary biog., v. 106) (via WWW, Feb. 27, 2007) (Cassell, Petter, Galpin and Company, London, 1878-1883; Cassell and Company Limited, London, 1883-1969; Cassell and Collier Macmillan, 1969-1978)