"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.