Herbert Spencer

It is only when you watch the dense mass of thousands of ants, crowded together around the Hill, blackening the ground, that you begin to see the whole beast, and now you observe it thinking, planning, calculating. It is an intelligence, a kind of live computer, with crawling bits for its wits.

I've always slightly preferred Spade to Marlowe, probably just because I thought Hammett was cooler than Chandler. He was leftwing, his name shortened to Dash rather than Ray, and he didn't smoke a pipe or like cats.