THE equipment of any well-appointed counting house in the late sixteenth century would include, as a matter of course, one or more money-books illustrating and evaluating all coins likely to come its master's way. Such money-books had originated in the late fifteenth century, when the invention of printing had made it possible to illustrate the official ordonnances, tariffs, or placards listing coins approved for circulation and giving their legal values. The earliest ones were no more than flysheets: a Flemish one of 1499 illustrating the nine ‘good florins of the Electors’, an English one of 1504 illustrating two English groats and a Flemish double patard. In the early sixteenth century these flysheets grew into small brochures, as their publishers found it convenient to take account of coins not mentioned in official proclamations but found commonly in circulation. They were, in fact, becoming illustrated versions of the privately compiled lists of coins and values which are known to us from the time of Pegolotti onwards. In due course they attained the status of substantial volumes, their format being often made tall and narrow, like that of account ledgers, so that they could stand with these on the merchant's shelves.