[Police joke]Clever man in jail joke

A man is in jail and got a note from his wife; it said, "When is a good time to plant my flowers? I'm going to dig up the garden."

Knowing that the guard reads all the letters, he wrote back, "No, that's where I put the cash."

A day later he got a letter that said, "People came and dug up the back yard!"

Then he said, "Now plant."