“I am not mad. I am eccentric perhaps--at least certain people say so; but as regards my profession. I am very much as one says, 'all there.”

“My dear Mr. Schwartz, you appeared in the nick of time. It might have been a drama on the stage! I am very much in your debt.”

“There! Now we're friends!" declared the minx. "Say you're sorry about my sister -""I am desolated!""That's a good boy!”

“Mrs. Cavendish: I am charming to my friends one day, and forget all about them the next.”

“I am all that there is of the most real.”

“That is what I mean. A bath! The receptacle of porcelain, one turns the taps and fills it, one gets in, one gets out and ghoosh - ghoosh - ghoosh, the water goes down the waste pipe!""M. Poirot are you quite mad?""No, I am extremely sane.”

“I am not one to rely upon the expert procedure. It is the psychology I seek, not the fingerprint or the cigarette ash.”