Deciding to visit their mine on their way back to the United States, the three chums had rather a hard time of it. Their doings and the things that happened to them are told in the fourth book of the series, “The Motor Boys Across the Plains.” They rescued a small boy from the hands of a bad gang of men, and this boy proved to be the son of a queer hermit, who lived on the shores of a lake.

The boys reached home safely, and with quite a sum of money to their credit. With part of this they purchased a fine, large motor boat, called the Dartaway. In her they had a series of adventures on river and lake, as related in “The Motor Boys Afloat.” They took part in races, won a prize, discovered the mystery of a strange schooner and cleared up the robbery of Mr. Slade’s department store.

But more exciting times awaited them. Their next vacation (for all their fun was had during the summers when there was no school) was spent at Harmon Beach, on the Atlantic coast, as recorded by me in “The Motor Boys on the Atlantic.” There they made the acquaintance of “Salt-Water Sam,” an old sailor and whaler, and with him made a successful chase after a whale and a shark. They also uncovered a plot to change the signals in a lighthouse, so that a steamer might be lured on the rocks, foiling the men, and aiding the aged keeper and his niece Jess.

Noddy Nixon, as the partner of Bill Berry (though Noddy claimed he did not know of the enormity of the offense) had a hand in the lighthouse plot. As soon as it failed Bill Berry disappeared and Noddy was not to be found for some time. Then, as there was no charge against him, Noddy returned to his home. His father would believe nothing wrong concerning him, and the bully was soon as bold as before. Being well supplied with money he had spent some of it in buying land in Florida, as Ned has already related. Bill Berry did not come back to Cresville, which fact made the three chums rejoice, for they did not wish to see that rascal again.

“Closing exercises this afternoon, which will be short and sweet,” observed Bob, as he and his friends came from the academy at noon, “and then to map out a summer campaign.”

“Yes, we want to get busy,” said Ned. “No use wasting time. You fellows come to my house to-night and we’ll look over some maps and plan a cruise. The motor boat is better than ever with the improvements we put on her last fall.”

“I’ll be there,” called Jerry, as he left his two chums. “I’ve got to go on an errand for my mother now, but I’ll be on hand after supper.”

“So will I,” added Bob. “I may be a little late though, because—”

“Because he has to eat so much supper; eh, Chunky?” and Jerry laughed as he shot that parting shaft.

“I promise to provide a light lunch at ten o’clock if you’ll stay that late,” called Ned. “So long!”