Take cotton wool and tissue paper. Lay the wool on the flower and the fine paper over it, and put this between the pages of any old folios or books. Tie a string round the books to keep all in place, and put them under an impromptu press of a board with a stone or weight on it, in the sun if possible, or even near the fire. The cotton wool absorbs the moisture and the heat dries the flower quickly. The wool prevents the delicate petals from being crushed, and so the character of the flower is preserved.