Who told him?

"Who was the girl about your size with long dark hair and a red coat son?" Dad asked soon after I had arrived home from Blackpool after a holiday with the lads. Now we lived in Armthorpe, a mining village three miles from Doncaster eighty or more miles from the seaside town that boasted a tower and the three Ms. Matthews, Mortensen and Moody all played for Blackpool football team He never did say who had given him the very accurate information about Betty.
Another incident that sticks in my mind took place five years earlier when I was twelve. I had been to town with my friend Eric. One the way there he had asked where my Dad was. "The old man is down at the pigeon loft", was my reply. On arriving home I was met with the words. "Less of the old man when you are out I' m your Dad." Dad tapped his nose when I asked how he knew................................. And they talk about surveillance today.