found: Lee, T.G. A plea for the English operatives, being a competing essay for the prize offered by John Cassell, Esq., 1850?
found: DNB(Cassell, John, 1817-1865; publisher)
found: Literature resource center WWW site, Nov. 30, 2016(John Cassell; born 23 January 1817, died 2 April 1865; worked as a publisher beginning in 1848; in the spring of 1852 Cassell moved his plant and offices from the Strand to 9 La Belle Sauvage Yard, Ludgate Hill; in 1855, to meet credit obligations, he sold his plant and name to the printing firm of Petter and Galpin)
found: 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)
found: The glass and the new Crystal Palace, 1853:title page (London : Published by J. Cassell, Ludgate Hill)
