On descending from the parapet, the officer unlocked a door, and, through a rather gloomy passage, led them into the interior of the fortress. Here they wandered for a quarter of an hour through a labyrinth of massive masonry, gazing with wonder at the solid walls, the arched stone roof, and the long series of rooms connected by doors. They found but one gun mounted, but that served to illustrate the principle on which the cannon are intended to work. The port-holes are so shaped that the guns are allowed a wide range, and yet there is little room for shot to enter from without. They have an inner and an outer flare, being narrowest in the centre of the wall. That part of the carriage farthest from the muzzle has a sideway motion, so that the gun may be readily pointed in any direction required. The fort will mount about three hundred guns.

Besides the gun-rooms there are a large number of other apartments, to which the party were introduced. Some of them are intended for ante-rooms, into which the soldiers may retire. They have fireplaces, and will doubtless wear an air of comfort and cheerfulness when finished and furnished. Other apartments, designed as parlors for the officers, are still more expensively finished. There are also kitchens, sleeping-rooms, magazines, cells for prisoners, &c.

“This must be one of the finest fortresses in the country,” said Mr. Davenport, as they came out once more into the open air.

“Yes, sir, it is,” replied the officer. “It is impregnable from sea; but, if it could be attacked by land, it might be blown to pieces, after a while. No masonry is solid enough to be proof against efficient land batteries,—that was proved at Sebastopol.”

“Well,” said Mr. Davenport, “the worst wish I have for Uncle Sam is that he may never have occasion to use this immense fortress.”

“I heartily join you in that wish, in spite of my profession,” replied the officer; and he then politely took leave of them.

Warmly thanking their guide for his attentions, the party hastened to their boat, and were soon on their way back. The wind had died away, and their progress homeward was not very rapid. The skipper evidently felt somewhat concerned for the credit of his craft. He declared that she was a swift sailer; but nothing, he said, could sail without wind, or in the face of a stiff breeze. His equanimity seemed to be still more seriously disturbed when a large schooner, with a great spread of canvas, came up behind him, and began to gain upon the Echo. He kept a sharp eye upon the intruder, as he evidently regarded her; and when she passed the Echo to the windward, instead of the leeward, he could no longer restrain his disgust, but remarked to Mr. Davenport, with some warmth:

“A fellow that’ll do that is no gentleman!”

A puzzled look from several of the ladies, who did not understand the nature of the offence, recalled him to a sense of his dignity, and he was soon as gallant and as good-natured as usual. In justice to him, it should be remarked that the schooner, by going to the windward, had taken the wind out of his sails, which is not considered a very courteous act among sailors.

The party reached the wharf in safety, and all declared that they never spent a pleasanter day than in their trip down the harbor.