Read it through once

All the passengers were on deck to look--even the gamblers--and Backus knew them all, and had afflicted them all with his pet topic. As I moved away, I saw one of the gamblers approach and accost him; then another of them; then the third. I halted; waited; watched; the conversation continued between the four men; it grew earnest; Backus drew gradually away; the gamblers followed, and kept at his elbow. I was uncomfortable. However, as they passed me presently, I heard Backus say, with a tone of persecuted annoyance--