What happen to the note that john left for his housekeeper in The Incredible Journey?

In "The Incredible Journey," John leaves a note for his housekeeper, informing her of the pets' journey and assuring her they are safe. However, the note is never found or read by the housekeeper because the animals embark on their adventure before she sees it. This leads to a series of events where the pets must rely on their instincts and each other to navigate the wilderness and return home. Ultimately, the note serves as a reminder of the bond between the animals and their owner, despite the lack of communication.