Note 31 — EARLY PRINTING.
Reading edition
They are small square blocks of metal, with the name in raised letters within a border, precisely similar to those used by the modern printer. Sometimes the stamp was round, or in the shape of a foot or hand, with the potter's name in the centre. They were in constant use for impressing the clay-works which supplied the wants of a Roman household. The list of potters' marks found upon fragments discovered in London alone amounts to several hundreds.