"No, sir," returned Dave.

"Was anybody near there, so far as you know?"

"Not very near. We met a number of the fellows on the river, while we were rowing toward the island."

"Who were some of those boys?" asked Doctor Clay.

Dave remembered that one of the boats had contained Roger, Ben, Sam Day, and Messmer, and remained silent.

"Don't any of you remember who were in the other boats?" asked the doctor, and his voice was sharper than ever.

"Nat Poole and Link Merwell were out in the motor boat," answered Phil.

"Yes, I know that, but both declare they were not near the island."

"Roger Morr, Sam Day, and a lot of others were out, but they were near the boathouse, and I don't think any of them went near Bush Island," answered Gus Plum.