what is the 'rumor' about the boat and the marsh? Also, who was Roy and what did he end up doing?

Rumors circulate among the donors about an abandoned boat in the middle of a marsh. Apparently, several carers have taken their donors to see the boat. Ruth hints that she would like to make such a trip, and Kathy suggests that perhaps the real reason for the trip would be to see Tommy, whose recovery center is near the abandoned boat. Roy is a Hailsham student one year older than Kathy, Tommy, and Ruth. He initiates the “tokens controversy.”