Hills senior was notorious for his political equivocations in the 1640s, working for the New Model Army while printing Leveller tracts and the Eikon Basilike. Through Cromwell he secured a monopoly on printing bibles. He became King's Printer in 1677 and Master of the Stationers’ Company in 1687. His son's notoriety resulted from his involvement in pirating the works of Dryden and Congreve among others.
From The Oxford Companion to the Book in Oxford Reference.