"We will show her ours," said the captain pleasantly, and pushed a button.

Instantly, with a crash that shook the ship, the forward gun of the Maria Braganza sent a shell whizzing through the air.

It fell short and wide of the steamer.

The captain turned to Poltavo, as for instructions.

"Sink her," said the count briefly.

But the steamer was never sunk.

The little ball that hung at the main suddenly broke, and out to the breeze there floated not the red ensign of the merchant service, but the Stars and Stripes of America—more, on the little flagstaff at the bow of the ship fluttered a tiny blue flag spangled with stars.

Livid of face, Captain Lombrosa sprang to the wheel.

"It's a Yankee man-o'-war!" he cried, and his voice was cracked. "We've——"

As he spoke the superstructure on the "intermediate," which had excited the count's curiosity, fell apart like a house of canvas—as it was—and the long slim barrel of a nine-inch gun swung round.