"No, not yet, uncle," Clifford answered, slowly. "And I'm not coming over for a few days. The fact is, we are here on a hunting trip and a mystery mission, and we want you to help us keep our secret. Since we have proved ourselves to be a very unusual lot of boys, perhaps you will take special care to favor us in this respect. We are planning a surprise on the girls, and we don't want you to tell them we are in town."