Let me add one more reference on _Thescelosaurus_ to the post I just sent: Morris, W. J., 1976. "Hypsilophodont Dinosaurs: A New Species and Comments on Their Systematics," in Churcher, C. S., ed., Athlon: Essays in Palaeontology in Honour of Loris Shano Russell, Toronto, Royal Ontario Museum: 93-113.