Examples might be indefinitely multiplied
from many an old book, so I will quote
but one more instance. The word _preserve_
spelt with a long _s_ might without
much carelessness be misread _preferre_
(I _Henry VI_., iii. 2), and thus entirely
alter the sense.

``III. _Errors from a `foul case_.'--This
class of errors is of an entirely different

kind from the two former. They came
from within the man, and were from the
brain; this is from without, mechanical in
its origin as well as in its commission. As
many readers may never have seen the
inside of a printing office, the following
short explanation may be found useful:
A `case' is a shallow wooden drawer,
divided into numerous square receptacles
called `boxes,' and into each box is put
one sort of letter only, say all _a_'s, or _b_'s,
or _c_'s. The compositor works with two of
these cases slanting up in front of him,
and when, from a shake, a slip, or any
other accident, the letters become
misplaced the result is technically known as
`a foul case.' A further result is, that the
fingers of the workman, although going to
the proper box, will often pick up a wrong