Dr Seuss First Day Covers. Pair of Dr Seuss First Day Covers with Dr Seuss Drawing of Cat in the Hat, Signed.All autographs & signed ephemera presented here is from the Cordelia Platt autograph collection. Highly regarded in the autograph industry, Cordelia was the president of the UACC (United autograph collectors club) and a well known dealer for many years. She was official authenticator of Marilyn Monroe and friend to many artists and cartoonists. American Antique Auctions is proud to present a slice of history with this collection presented without reserve. No COA