Pursued by English bishops for his puritan printing, he went underground to print the ‘Martin Marprelate’ tracts (1588–9). By 1590, he was in Edinburgh and appointed King's Printer, publishing the works of King James and becoming Scotland's most prolific printer. He troubled the English trade with editions of English works and Puritan tracts, and was tried for treason in Scotland in 1597 for Presbyterian printing. He followed James to London in 1603, dying shortly thereafter.
From The Oxford Companion to the Book in Oxford Reference.