Sherlock Holmes - Deductions

“Sorry to see that you’ve had the British workman in the house. He‘s a token of evil. Not the drains, I hope?”
“I see that you are professionally rather busy just now,” said he, glancing very keenly across at me.

“When your round is a short one you walk, and when it is a long one you use a hansom. As I perceive that your boots, although used, are by no means dirty, I cannot doubt that you are at present busy enough to justify the hansom.”

“Therefore a third person must have entered the room. And that third person could only have come in through the window.”

“It can run up a curtain, and it is carnivorous.”

“Therefore something had occurred between seven-thirty and nine o’clock which had completely altered her feelings towards him.”

“It is perfectly plain that after the ladies parted from this man he followed them at a distance, that he saw the quarrel between husband and wife through the window, that he rushed in, and that the creature which he carried in his box got loose.”