While not a sketch, this "Mail Pilot" book represents one of the earlier cross-marketing efforts of Disney. The book I have is not in very good shape, but it makes a great addition to the collection.
Disney's "Mail Pilot" Book
----- DATABASE NOTES -----
Disney, Walt. Mickey Mouse The Mail Pilot. Racine, WI: Whitman Publishing, 1933. The Big Little Book. Some of the pages at the end of the book are missing. Children’s names written in the front and back of the book. “Vitale Cashis, 47 Montgomery St., Middletown, NY.” [Item: 4.5”W x 4.5”H x 1.25”D] SeqID-0203