Flies and gnats stuck to the paper and disturbed me; I blew on them to make them go away, then blew harder and harder, but it was no use. The little pests lean back and make themselves heavy, putting up such a struggle that their thin legs bend. They just cannot be made to budge. Having found something to latch onto, they brace their heels against a comma or an unevenness in the paper and stand stock-still until they find it convenient to take off.