ch that day, you said you were
going to come back for her, you know."

Bob's reference was to the daughter of Don Fernandez y Calomares, an
aristocrat of pure Castilian blood living in a palace in the Sonora
mountains in Old Mexico. The previous summer, the Don as leader of a
faction of Mexican rebels had kidnapped Jack's father, mining engineer
in charge of oil properties in New Mexico, and carried him prisoner to
his retreat. Thereby, the Don had hoped to embroil the United States
with President Obregon of Mexico, perhaps to bring about American
intervention, all of which would be of benefit to the rebel cause. Mr.
Temple, however, had decided the kidnapping of his friend and business
associate should be kept secret, in order to prevent American
intervention which he considered would be harmful to both countries.
The boys had gone into Old Mexico and, through a series of exciting
adventures as related in "The Radio Boys on the Mexican Border," had
effected Mr. Hampton's rescue. Jack had fallen victim to the charms of
the Don's daughter.

Now, at Bob's words, Jack said nothing, but looked away over the
moonlit water.

Well, his thoughts often when he was alone were concerned with the
fascinating Spanish girl. Even the passage of a year's time had not
served to efface her image from his memory. Someday----

"Come on," said he, jumping up, and pushing his two companions over
into the sand. "Beat you home."

He darted away, and they tore after him.

At the end of the summer, all three boys went away to Yale at New
Haven, Conn. Jack was in his second year, a Sophomore. Bob and Frank
entered as Freshmen.

During their college year, all three kept alive their interest in
radio, and followed every new development. Jack even went further,
inventing a revolutionary device for the application of radio. Of
that, there is no space to speak now. But in an account of their
further adventures it will be properly introduced.

The following vacation period, Mr. Hampton went to Peru in connection
with the development of rich mining properties in a new region, and
took Jack with him. Frank and Bob pleaded so hard for permission to
accompany the Hamptons that Mr. Temple gave his consent.

There, an amazing series of adventures befell them. But they will be
duly recorded in "The Radio Boys Search for the Incas' Treasure."

The End

THE RADIO BOYS SERIES

BY GERALD BRECKENRIDGE

A new series of copyright titles for b