Take your pocket-handkerchief. and laying it out the full square, double down one-third over the other part. Then raise the whole and turn it over, so that the third folded down shall now be underneath. Then take hold of one of the folded corners, and draw its point towards the centre; then do the same with the other, as in making a cocked-hat, or a boat, of paper. Then take hold of the two remaining corners, and twisting the hem of the handkerchief, continue to roll it until it meets the doubled corners brought to the centre, and catches them up a little. Lift the whole and you will see the form of a cap, which will cover the head and ears, and being tied under the chin, will not come off. Very little practice will enable you to regulate the size of the folds, so as to suit the head.