"We had best introduce ourselves and then all the conventionalities will be observed. Conventionality is a mighty important thing for boarding school girls to observe. These are the Tucker twins, called Tweedles when you want both of them or aren't particular which one answers. This red-headed one is Dum; this blue-headed one, Dee. They have other official names, but somehow I can't remember them to-day. I am Jeffry Tucker, at your service, the father of the Heavenly Twins."