“It is completely unimportant. That is why it is so interesting.”

“People should be interested in books, not their authors.”

“I often wonder why the whole world is so prone to generalise. Generalisations are seldom if ever true and are usually utterly inaccurate.”

“What are you doing, Poirot?""I dissect rucksacks. It is very interesting.”

“An archaeologist is the best husband a woman can have. The older she gets, the more interested he is in her.”

“The spoken word and the written - there is an astonishing gulf between them. There is a way of turning sentences that completely reverses the meaning.”

“Why didn't they ask the Evans?”