A Case for Dr. Morelle - The Blackmailer

Late in the evening, Sir Clifford and Lady Forbes are returning to their home in Winchester from a party. Lady Forbes says "That was a really nice party". Sir Clifford says "Yes, it was". He looks at his watch and says "I didn't realize it was so late. It is 2 o'clock in the morning". Lady Forbes says "There is no light on in Cynthia's room". Sir Clifford says "I'm sure our daughter has gone to bed hours ago". Lady Forbes says "I'm tired". Sir Clifford says "Yes, we are getting too old for these late nights". As they enter their residence, Sir Clifford says "You go up to bed, I'll bring some hot milk". Lady Forbes says "Thank you, dear". A few seconds later, she says "There's a funny smell of gas". He says "It's gas, alright". She says "Someone must have left the gas tap on in the kitchen". He says "I'll go and see. Don't worry, dear". As Sir Clifford enters the dark kitchen, he says "By Jove, there is a strong smell of gas. It is over bearing. Where is the light switch?" He finds the switch, turns the lights on, and yells "What the...Cynthia, Cynthia!"