The Ambulance Made Two Trips

The Ambulance Made Two Trips is a short story written by Murray Leinster. 

Detective Sergeant Fitzgerald found a package before his door that morning, along with the milk. He took it inside and opened it. It was a remarkably fine meerschaum pipe, such as the sergeant had longed irrationally to own for many years. There was no message with it, nor any card. He swore bitterly.