Talbot Baines Reed,
A History of the Old English Letter Foundries
“ It is probable, however, that, as Bernard suggests, the printers would cast enough to enable one forme to be composed while the other was working, so that double these quantities would possibly be provided. Nor must it be forgotten that a “fount” of type in these days consisted not only of the ordinary letters of the alphabet, but of a very large number of double letters, abbreviations and contractions, which must have seriously complicated the labour of composition, as well as reduced the individual number of each type required to fill the typefounder’s “bill.” ”
