How it started
J. & J. Harper (1817–1833)
James Harper and his brother John, printers by training, started their book publishing business, J. & J. Harper, in New York City in 1817. Their two brothers, Joseph Wesley and Fletcher, joined them in the mid-1820s.
Harper & Brothers (1833–1962)
The company changed its name to "Harper & Brothers" in 1833. The headquarters of the publishing house was located at 331 Pearl Street, facing Franklin Square in Lower Manhattan near the present-day Manhattan approach to the Brooklyn Bridge.
Harper & Brothers began publishing Harper's New Monthly Magazine in New York City, in 1850. The brothers also published Harper's Weekly (starting in New York City in June 1857), Harper's Bazar (starting in New York City on November 2, 1867), and Harper's Young People (starting in New York City in 1879).
George B. M. Harvey became president of Harper's on November 16, 1899.
From Wikipedia’s article on Harper, shared under CC BY-SA 4.0.2