Dr Watson was making his way back to Baker Street when he bumped into an old colleague whom he hadn’t seen or heard of for twenty years. They had been at medical school together and had graduated at the same time.
“Where are you now?” asked Watson.
“I’m the head surgeon at London’s Hammersmith Hospital,” came the reply.
“And this little girl,” said Watson. “Is she yours?”
“Yes, I’ve been married for eight years now.”
The little girl tugged on Watson’s jacket. “My name’s Mary,” she said.
“Fancy that,” replied Watson patting her on the head. “The same name as your mother.”
HOW DID WATSON KNOW THAT ?