When it is in the letter box, Mother lets them take the key.
They unlock the box and take out the mail.
Then one of them locks the box and the other one takes the mail in to Mother.
One day Bobby asked, “Where does the postman get the mail?”
“At the post office,” said Mother. “The postmaster has men to sort the mail and take it to the people.”
“Does the postmaster pay our postman?” asked Bobby.
“No, dear,” answered Mother. “Uncle Sam pays our postman.”
“Does Uncle Sam pay the postmaster?” asked Bobby.
“Yes, Bobby,” answered Mother. “Uncle Sam pays all the men who take care of the mail.”