Cut into eight half quarters a stale quartern loaf: with one of these
pieces, after having blown off all the dust from the paper, to be
cleaned by means of a good pair of bellows, begin at the top of the
room, holding the crust in the hand, and wiping lightly downwards
with the crumb, about half a yard at each stroke, till the upper
part of the hangings is completely cleaned all round; then go again
round with the like sweeping stroke downwards, always commencing each
successive course a little higher than the upper stroke had extended,
till the bottom be finished. This operation, if carefully performed,
will frequently make very old paper look almost equal to new. Great
caution must be used not by any means to rub the paper hard, nor to
attempt cleaning it the cross or horizontal way. The dirty part of
the bread too must be each time cut away, and the pieces renewed as
soon as necessary.