if you're wise you will
imitate me by taking to your heels."

Still holding Dave's arm lightly, Jetson sprinted along to the next
corner.

"To the right," whispered Dave. "I've a taxicab here."

More than halfway down the block they saw the car at the curb. The
chauffeur, when Dave called, stepped from a doorway in which he had
taken refuge.

"The Apaches!" gasped the driver.

"Hustle!" urged Dave. "Come on, Jetson."

As the two young naval officers sprang into the car, the driver leaped
to his own seat. Pressing the self-starter, the chauffeur soon had his
machine gliding along. Nor did he go back, either, by way of the Rue
d'Ansin.

Not until he was four blocks away from the scene did the man ask for
his orders.

"Back to the Embassy," Dave instructed him. Then he remembered his
comrade's swift, fine rescue.

"Jetson," he asked, "did you know it was I who was menaced by the
Apaches?"

"I did not," replied his brother officer. "But I heard enough, at a
distance, to know that an American was in trouble. In Paris that is
sufficient for me. Darry, I am delighted that I happened along in
time."

"You saved my life, Jetson, and at the risk of your own. If you had
missed one of the Apaches, or had lost your balance, your career would
have been ended right there, along with mine."

"You risked your life for me, Darry, back in the old Annapolis days,
so we are even," answered Jetson gently. "However, we won't keep books
on the subject of brotherly aid. All I can say, Darry, is that I am
glad I chose this night to call on an artist who lives in dingy
quarters half a mile beyond where I found you. And I am also glad that
I did not accept his invitation to supper, or I should have come
along too late to serve you."

As soon as the machine had left them at the Embassy, Darrin sought out
Mr. Lupton.

"May I see Mr. Caine at once?" asked the young officer.

"You have seen Gortchky, then?"

"Yes, and I have found what I consider positive proof as to the plans
of Gortchky's crew."

"I think Mr. Caine can be seen," replied Lupton.

Ensign Darrin was soon with the American Ambassador, who nodded to
Lupton to leave the room.

"Here, sir," began Darrin, "is a bit of paper that Gortchky dropped
and which I picked up."

Mr. Caine scanned the paper.

"I do not see anything so very remarkable about it," he replied.

Dave whispered a few words in his ear.

"Is that true?" asked the Ambassador, displaying sudde