#3 When each try to wash the carpet failed, he determined to do that.
However when he pulled the carpet out, he discovered one thing hidden beneath. What might it have been? Is it some type of time capsule? Sure, and a lot extra!
#4 There was a protected hidden beneath that might probably maintain many recollections.
It was in plain sight, but by no means earlier than seen. However now he had to determine the right way to open it.