Mrs. Whatsit, Mrs. Who, and Mrs. The Arrowbile was a development of Waterman's tailless aircraft, the Whatsit. Who, Mrs. Which and Mrs. Whatsit tesser the Murrys and Calvin back to Earth. Before Mrs. Whatsit finishes her sentence, she and the others disappear. Two of his books, "The Chuckling Whatsit" and "Mad Night", began as serials. While Lehecka owned it the aircraft picked up the nickname of the "Whatsit". Then the trio of Mrs. Whatsit, Mrs. Who, and Mrs. Which arrive. A development of the Whatsit was the high-wing Waterman Arrowplane. They are joined by their mother and visited by their new eccentric neighbor, Mrs. Whatsit. It is an allusion to the slang term "whatsit", to which it is phonetically identical. One actor plays Mrs Whatsit, the Man with Red Eyes, and Camazotz Man. The Whatsit had a truncated fuselage and a forward trim plane. The Whatsit also featured a wing-mounted tricycle undercarriage and a trim foreplane.