Dorothy L. Sayers, Whose Body?

"I give you full credit for the discovery, I crawl, I grovel, my name is Watson, and you need not say what you were just going to say, because I admit it all."

"... I should wish to add, as a tribute to the great merits of your lordship's cellar, that, although I was obliged to drink a somewhat large quantity both of the Cockburn '68 and the 1800 Napoleon I feel no headache or other ill effects this morning. Trusting that your lordship is deriving real benefit from the country air, and that the little information I have been able to obtain will prove satisfactory, I remain, With respectful duty to all the family, their ladyships, Obediently yours, MERVYN BUNTER. 　"Y'know," said Lord Peter thoughtfully to himself, "I sometimes think Mervyn Bunter's pullin' my leg."

"Lord Peter's library was one of the most delightful bachelor rooms in London. Its scheme was black and primrose; its walls were lined with rare editions, and its chairs and Chesterfield sofa suggested the embraces of the houris. In one corner stood a black baby grand, a wood fire leaped on a wide old-fashioned hearth, and the Sèvres vases on the chimneypiece were filled with ruddy and gold chrysanthemums. To the eyes of the young man who was ushered in from the raw November fog it seemed not only rare and unattainable, but friendly and familiar, like a colourful and gilded paradise in a mediæval painting"

"You're thinking that people don't keep up old jealousies for twenty years or so. Perhaps not. Not just primitive, brute jealousy. That means a word and a blow. But the thing that rankles is hurt vanity. That sticks. Humiliation. And we've all got a sore spot we don't like to have touched."

"But if you were investigating a crime,” said Lady Swaffham, “you’d have to begin by the usual things, I suppose — finding out what the person had been doing, and who’d been to call, and looking for a motive, wouldn’t you?”“Oh, yes,” said Lord Peter, “but most of us have such dozens of motives for murderin’ all sorts of inoffensive people. There’s lots of people I’d like to murder, wouldn’t you?”“Heaps,” said Lady Swaffham."

"I looked for any footmarks of course, but naturally, with all this rain, there wasn't a sign. Of course, if this were a detective story, there'd have been a convenient shower exactly an hour before the crime and a beautiful set of marks which could only have come there between two and three in the morning, but this being real life in a London November, you might as well expect footprints in Niagara. I searched the roofs right along—and came to the jolly conclusion that any person in any blessed flat in the blessed row might have done it."

"Lord Peter was hampered in his career as a private detective by a public school education. Despite Parker's admonitions, he was not always able to discount it. His mind had been warped in its young growth by "Raffles" and "Sherlock Holmes," or the sentiments for which they stand. He belonged to a family which had never shot a fox. 'I am an amateur,' said Lord Peter"

"The really essential factors of success in any undertaking are money and opportunity, and as a rule, the man who can make the first can make the second."