"All as plain as mud," shouted Arnold. "I left the horseshoe crab shell in the forward cabin. It must have got kicked about during the evening and left with the tail sticking straight up. When this fellow came down the steps, he landed on it kerplunk."
"Right-O!" declared Frank. "At least," he continued, "that's my deduction. If anyone has a better explanation, let him give it."
None was offered, however, the boys seeming to agree that Arnold's explanation had been correct. They all waited to hear further from Frank. He noticed their hesitation and continued:
"I think it would be a good idea to go and interview this lad. He looks to me like a tough customer here for no good."
This suggestion met with instant approval. The boys crowded forward eagerly. One or two automatics were displayed.
"Hello, what's this," questioned Harry, picking up an object from the bunk beside the visitor who was lying on his side.
"Why, it's a piece of raw meat," he exclaimed. "Where did that come from? We haven't any beef aboard, have we?"
"Not that I know of," answered Arnold. "It's only a small piece. Give it to Rowdy. He needs a lunch."
"Stop," shouted Jack. "Don't give that to Rowdy."