Uncle Dudley receives a telegram informing him that his rich Great Aunt Hortense is coming for a visit. He is trying to impress her so she will leave him everything in her will. She intends to leave her fortune to the neatest, quietest relative with the most orderly home life, and she absolutely cannot stand dogs. Sandy has the clever idea to clean out the attic so that they can hide Dinky up there during Hortense's visit.
