"This young man is very much interested in meeting Mr. Porter," explained Billy Dill. "His name is Porter, too, and I reckon they are related. Have you any idea where we can find out where Dunston Porter went?"
"Might find out at the shipping offices."
"Why, of course!" exclaimed Dave. "Let us go to the different offices at once."
Billy Dill was willing, and without loss of time led the way to the street upon which the majority of the shipping of Cavasa Island was booked. The offices were mostly small and rather dirty, and around them hung sailors and other men, of various nationalities, and some of them far from preposessing in their general appearance.
They visited two offices without success, and then came to a place located on a corner, with doors on both streets.
"Hello!" cried Roger. "There is Mr. Van Blott just ahead of us! Is this the shipping firm with which Mr. Lawrence does business?"
"I don't think it is," answered Billy Dill.
"Then what is he doing here?"
"Must have a little business of his own," said Dave. "But I don't care. Come along." Just then he was thinking only of his personal affairs.
They entered the office, which reeked of tobacco smoke and the smell of rum. In the rear was another office, and they were just in time to see
