Bradford learned the printer’s trade in London and then immigrated to Pennsylvania in 1682. Settling in Philadelphia, he opened a printing shop in 1685 and a bookstore in 1688. In 1690, with William Rittenhouse and others, he established the first paper mill in America, at Roxborough, Pennsylvania (now in Philadelphia). After he fled persecution in Pennsylvania for printing a seditious broadside (a sheet of paper with printing on one side) the year before, Bradford went to New York in 1693 and was appointed royal printer for the colony. In the next half-century, issued about 400 titles.