E. Gordon Duff, The printers, stationers and bookbinders of Westminster and London from 1476 to 1535 (1906)
“ Then again quite half the editions produced for sale in England are without any imprint, so that we are left to conjecture who was the printer from the type or cuts used in the books. To further bewilder us, sets of cuts passed from printer to printer, and are very untrustworthy guides in assigning books. ”
