New York 1848 to 1872(?) One successor to Wiley and Putnam, from 1840 According to Wikipedia, succeeded by G. P. Putnam's Sons in 1872 when sons George and John inherited the business. On the other hand, all of these publisher or imprint names are attested prior to 1872: • George P. Putnam • George P. Putnam & Son • G. P. Putnam & Son • G. P. Putnam & Sons For the latter see Putnam's Magazine, 2nd series, bound volume 6 title page (viewed at HathiTrust). As of February 2019, HathiTrust holds bound volumes 2 and 6, of six semiannual volumes, whose title pages display (quote last two lines): • G. P. Putnam & Son, 661 Broadway. // 1868. • G. P. Putnam & Sons, 4th Ave. & 23rd St.// 1870. George Palmer Putnam (1814–1872) dissolved Wiley & Putnam, his partnership with John Wiley, in 1848 (or 1847, which the Library of Congress reports for Wiley & Putnam). Both partners continued in the business, each eventually with two sons.