38 “Ben, is your team ready to go?” Paul asked. The six teenagers gave a throaty roar and piled into the small motorboat. Paul checked one last time that they all had their life jackets on. Four more boys were in a boat with Wendy and Lauren. Paul had the final five of Ben’s classmates in his boat. Wendy had been worried the boys couldn’t be trusted not to ram each other, but he’d assured her the boat hire included a compulsory safety lesson. Anyway, Ben was sensible enough to play within the rules and had helped him divide up the teams. The shyer, less confident boys were with Wendy and Lauren, and Paul had the only two likely to get carried away. Paul blew his whistle and all the excited chatter died down. “This is a scavenger hunt. Every boat leader has a map of Berowra Waters and t

