ome of Beecher's work," was Professor Bumper's grim comment.
"It seems that Jacinto was in his pay."

"In his pay!" cried Mr. Damon. "Do you mean that Beecher deliberately
hired Jacinto to betray us?"

"Well, no. Not that exactly. Here, I'll translate this note for you,"
and the professor proceeded to read:

"Senors: I greatly regret the step I have to take, but I am a
gentleman, and, having given my word, I must keep it. No harm shall
come to you, I swear it on my honor!"

"Queer idea of honor he has!" commented Tom, grimly.

Professor Bumper read on:

"Know then, that before I engaged myself to you I had been engaged by
Professor Beecher through a friend to guide him into the Copan valley,
where he wants to make some explorations, for what I know not, save
maybe that it is for gold. I agreed, in case any rival expeditions
came to lead them astray if I could.

"So, knowing from what you said that you were going to this place, I
engaged myself to you, planning to do what I have done. I greatly
regret it, as I have come to like you, but I had given my promise to
Professor Beecher's friend, that I would first lead him to the Copan
valley, and would keep others away until he had had a chance to do his
exploration.

"So I have led you to this wilderness. It is far from the Copan, but
you are near an Indian village, and you will be able to get help in a
week or so. In the meanwhile you will not starve, as you have plenty
of supplies. If you will travel northeast you will come again to
Puerto Cortes in due season. As for the money I had from you, I
deposit it to your credit, Professor Beecher having made me an
allowance for steering rival parties on the wrong trail. So I lose
nothing, and I save my honor.

"I write this note as I am leaving in the night with the Indians. I
put some harmless sedative in your tea that you might sleep soundly,
and not awaken until we were well on our way. Do not try to follow us,
as the river will carry us swiftly away. And, let me add, there is no
personal animosity on the part of Professor Beecher against you. I
should have done to any rival expedition the same as I have done with
you.

JACINTO."

For a moment there was silence, and then Tom Swift burst out with:

"Well, of all the mean, contemptible tricks of a human skunk this is
the limit!"

"Bless my hairbrush, but he is a scoundrel!" ejaculated Mr. Damon, with
great warmth.

"I'd like to start af