The losses of the Spaniards must indeed have been heavy, though they were never accurately known. In any case the earthworks were considerably battered. But this bombardment opened the eyes of many people, for it proved that fortifications do not suffer very severely under heavy fire. The heaps of débris flying into the air make it appear as if havoc were being wrought, whereas the destruction brought about at such very long ranges is nothing compared with that produced in the old days of muzzle-loaders, round shot, and a point-blank range.

"Wall, young sirs, we've had one day at it, and a precious hot one it's been," remarked Lieutenant Samuel K. Billing, "and I reckon we've wiped the eyes of the Dons. There's information to hand that one of our gunboats got mauled a few days ago. So, you see, it's only right that we should have the best of it to-day, and get some luck to make up for the other. Say, Mr. Marchant, sir, how'd you and your chum care for a little excursion? Just a game that's goin' to be started along the coast."

"I am sure we should like it very much," Hal answered. "What exactly is it?"

"That's tellin', sir. You'd like to join, you say, and so you shall; but keep it a dead secret. If the commodore knew that I had let the cat out of the bag, it would be a case of an explosion bigger than those over there."

Hal and Gerald wondered what particular excursion they were to take part in, but four days passed without anything happening. On the fourth night, however, they were turned out of their bunks by their naval friend again.

"Say, boys," he said in a whisper, "the time's come along. Get on deck right away, and make for the after gangway. There's a kettle alongside that's smokin' like a kitchen. It's the Hudson, an armed revenue cutter. Come, shake the sleep out of your eyes, or I withdraw my promise."

They needed no second bidding, but, jumping hastily into their clothes, ran on deck. A rope ladder was hanging overboard, and they descended by this means to the cutter, which was, in reality, a small gunboat.

"Sheer off there!" someone cried, showing a light, and at once the little vessel quivered as her screw revolved. Hal and his friend turned, to find the lieutenant of the New York standing beside them.

"Naval instruction," he said, as if to explain his presence there. "That's what I am flying after; trying to get hold of the games these kettles play."

"Humbug!" exclaimed another officer, approaching at the moment. "You know as well as anyone that it is a lark, a bit of extra excitement that you're wantin'. But you're forgetting, Samuel. Introduce me."