“I’m afraid I’ll have to stop now,” said Joe reluctantly, after half an hour of good practice, as he looked at his watch. “I’ve got to stop at Brigg’s store to get a couple of bamboo poles, and then I have to go down to the station to meet a friend whom I rather expect by the four-thirty-five. I’m sorry, too, for I’m just getting warmed up and I’d like to keep going for an hour yet.”