Once they had an auto they decided on a trip across the continent, and their doings on that journey are recorded in the second book of this series, entitled “The Motor Boys Overland.”

It was while out riding in their auto in Cresville one evening that they came across a wounded miner in a hut. He turned out to be Jim Nestor, who knew the secret of a lost mine in Arizona. While sick in the hut, Nestor was robbed of some gold he carried in a belt. Jack Pender was the thief, and got away, although the Motor Boys chased him.

With Nestor as a guide, the boys set out to find the lost mine. On the way they had many adventures with wild cowboys and stampeded cattle, while once the auto caught fire.

They made the acquaintance, on the prairies, of Professor Uriah Snodgrass, a collector of bugs, stones and all sorts of material for college museums, for he was a naturalist. They succeeded in rescuing the professor from a mob of cowboys, who, under the impression that the naturalist had stolen one of their horses, were about to hang him. The professor went with the boys and Nestor to the mine, and was still with them.

The gold claim was not easily won. Noddy Nixon, Pender, Berry and one Pud Stoneham, a gambler, aided by Tom Dalsett, who used to work for Nestor, attacked the Motor Boys and their friends and tried to get the mine away from them.

However, Jerry and his friends won out, the sheriff arrested Stoneham for several crimes committed, and the others fled in Noddy’s auto, which he had stolen from his father, for Noddy had left home because it was discovered that he had robbed the Cresville iron mill of one thousand dollars, which crime Jerry and his two chums had discovered and fastened on the bully.

So it was no small wonder, after all the trouble Noddy and his gang had caused, that Jerry felt he and his friends might hear more of their unpleasant acquaintances. Noddy, Jerry knew, was not one to give up an object easily.

In due time town was reached, the letters were mailed, and the supplies purchased. Then the auto was headed back toward camp. About five miles from the gold diggings, Ned, who sat on the front seat with Bob, who was steering, called out:

“Hark! Don’t you hear some one shouting?”