Enquire within upon everything by Robert Kemp Philp

Cut into eight half quarters a quartern loaf, two days old; it must be neither newer nor staler. With one of these pieces, after having blown off all the dust from the paper to be cleaned, by the means of a good pair of bellows, begin at the top of the room, and, holding the crust in the hand, wipe lightly downward with the crumb, about half a yard at each stroke, till the upper part of the hangings is completely cleaned all round. Then go round again, 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 care must be taken not to rub the paper hard, nor to attempt cleaning it the cross or horizontal way. The surface of the bread, too, must be always cut away as soon as it becomes dirty, and the pieces renewed as often as may be necessary.