(1631/2–76) An accomplished English calligrapher acclaimed by Pepys as ‘the famous writing-master’ (10 August 1664), Cocker produced numerous copybooks. Not all of these survive, but some were frequently reprinted in the 17th century. He also engraved copybooks for fellow calligraphers. He is more widely known for Cockers Arithmetick, published posthumously in 1678, from which the phrase ‘according to Cocker’ (i.e. ‘exactly’) derives.
From The Oxford Companion to the Book in Oxford Reference.