A Fly in the tea canister was a foolproof method used by an old man across the river years
ago.The man had married a girl much younger than himself and he was a skinflint at heart.
When he had to go away for a day he suspected that his wife entertained.
To keep a check on what was going on while he was away he used to put a fly in the tea
caddy and if the fly escaped he knew that tea had been brewed.Interested in a fly ?