Letter to S. Dillon Ripley from Thos. Cook & Son Ltd, August 23, 1944, Smithsonian Archives - History Div, Letter to S. Dillon Ripley from Thos. Cook & Son Ltd. states that they have shipped per SS Ethan Hitchcock one crate containing scientific specimen and are enclosing papers which Ripley needs to forward to the consignee by airmail. Also enclosed is Cook's account which he is to pay at his earliest convenience..