we are crabbing, but we can pull up the anchor, and the tide will take us nearly to where he is digging. He can't say anything, if we do that, for we have a right to drift."
"Yes, and then we can see if he has a boat," added Sammy. "I guess that's the best plan. But what about these crabs, Bob? Won't your mother want them for dinner?"
"No, she's going to make them into a salad for supper. We fellows will have to cook 'em, and pick 'em out of the shells, I expect. There will be time enough when we get in. Let's trail this old man now."
Accordingly the small pronged anchor, that held the boat from drifting while the crabbing was going on, was hauled up, and put in the bow. Then, while pretending to be busy with their crab lines, the boys let their craft drift with the tide over toward the shore.
The old man was still digging away, but he had moved his position and was now deeper in the clump of trees.
"I'm sure he's after pirate gold!" exclaimed Sammy, in a whisper, for he knew sounds carry very distinctly over water, and he did not want the digging man to hear him.
"He's after something, right enough," agreed Frank. "What it is we can find out later."
"There's a boat, anyhow," put in Bob, pointing to one partly hidden under some brush and seaweed not far from the shore.
"That's right!" cried Sammy. "That shows he came from some other part of the Cove. We'll follow him!"
But, for the present, the man did not show any sign of being about to leave the clump of trees. He was digging away, paying no attention to anything around him, save to glance up now and then. If he saw the boys, as he must have done, he gave no sign.
Bob and his two chums, now that they were where they
