As they were reading of inscribing and circumscribing figures, said he, I will show you how to inscribe a triangle in a quadrangle. Bring a pig into the quadrangle and I will set the college dog at him, and he will take the pig by the ear, then I come and take the dog by the tail and the hog by the tail, and so there you have a triangle in a quadrangle; quod erat faciendum.

Brief Lives 'Ralph Kettel'