O’Brien’s Wholesale Business Intelligencer and Southern and Western Merchants’ Pocket Directory, to the Principal Mercantile Houses In The City Of Philadelphia For The Year 1839. Wherein each branch of business is distinctly named and separately placed, with the names of the firms, numbers, and streets accurately arranged under their respective…

John G. O’Brien (1807–1858), an Irish-American purveyor of popular medicines in Philadelphia, published a series of business directories between 1839 and 1853, producing about a...... Read More about O’Brien’s Wholesale Business Intelligencer and Southern and Western Merchants’ Pocket...