Again their bonds were removed, and under cover of the revolvers of their captors, which the latter kept concealed in their coats but which the three prisoners knew were ever ready, Hal, Chester and Uncle John stepped from the car.

The Austrian ambassador and Robard had alighted before them, and Hal could see them talking and gesticulating excitedly.

"Wonder what's up?" he muttered.

"Which way from here, do you suppose?" asked Chester.

"Trieste, I should say," replied Uncle John. "They will want to get over the border as soon as possible, and I guess they will head in that direction."

"My idea, too," agreed Hal.

What was their surprise, then, when, instead of boarding another train, as Hal had confidently believed would be done, the ambassador led the way into the station and then to the street beyond. Here Robard disappeared for a brief moment, and returning, motioned the ambassador and others to follow him.

Again the prisoners found themselves shoved into a large touring car, which started immediately in the wake of the one which bore Robard and the ambassador.

"Some funny business here, as sure as you're born," said Chester excitedly.

"Must be," declared Hal grimly. "Robard and the ambassador have something up their sleeves. Wonder if the Italian authorities are not on their guard. There is no telling what these fellows may do."