"Oh, I guess there's no danger," decided Bart. "There are lots of strangers in town to-day, and we won't attract much attention. But we must take after this fellow. We'll trail him carefully now. He's still on this side of the street, and he's going slowly," Bart announced, after taking an observation over the heads of the crowd still in front of the store window. "Fenn and I will take this side of the street, and you and Ned can take the other side, Frank. If either of us miss our man we'll meet later at the hotel. Go ahead now, and keep out of his sight. Go slow, as if you were only looking at the sights, but keep your eye on the man. We'll try and find where he belongs, who he is, and why he collects turtles."