How Did Sancho Get Clues to Find William's Hiding Place?

Who gave Sancho the clues to figure out where William may be hiding?

"Mrs. Morningstar" gave Sancho the clues to figure out where William may be hiding.

In the play, Sancho and Bolsa are sent to a restaurant called "The Purple Cow" by the cemetery groundskeeper. When they get to the restaurant, they are given a table and menus to look at and told their waitress will be there soon.

Mrs. Morningstar told Sancho that her sink was leaking, her toilet and oven were dirty, and she only eats vegetarian food while her food is getting cold on the table.

Sancho received the clues to William's hiding place from Mrs. Morningstar due to the specific details she shared about her living conditions.