“Remember mumps,” he warned her almost threateningly, and off he went again. “Mumps one pound, that is what I have put down, but I daresay it will be more like thirty shillings don't speak measles one five, German measles half a guinea, makes two fifteen six don't waggle your finger whooping-cough, say fifteen shillings” and so on it went, and it added up differently each time; but at last Wendy just got through, with mumps reduced to twelve six, and the two kinds of measles treated as one.