200
                                What is Nick describing in this quote?  "....he stretched out his arms toward the dark water in a curious way, and, far as I was from him, I could have sworn he was trembling. Involuntarily I glanced seaward—and distinguished nothing except a single green light, minute and far away, that might have been the end of a dock. When I looked once more for him he had vanished, and I was alone again in the unquiet darkness."
                                The first time he saw Gatsby/Gatsby's obsession