The road from the head, of the Estrella cove to the crest of the Morro promontory forks at a distance of seventy-five or one hundred yards from the cable-house, one branch of it turning to the left and climbing a steep grade to the summit of the ridge east of the castle, where stand the lighthouse and the barracks, while the other branch goes straight on in a rising slant to a rocky buttress situated almost perpendicularly over the point where the southern shore of the cove intersects the eastern margin of the harbor channel. Turning to the left around this buttress, it runs horizontally southward along a shelf-like cornice in the face of the precipice until it reaches a spacious terrace, or esplanade, cut out of the solid rock, at a height of one hundred and fifty feet above the water. This terrace, which is on the western face of the castle and directly under its lower bastions, seems to have been intended originally for a gun-platform, but there is nothing there now to indicate that guns were ever mounted on it. It has no parapet, or battlement, and is merely a wide, empty shelf of rock, overhanging the narrow entrance to the harbor, and overhung, in turn, by the walls of the fortress. In the mountain-side back of it are four or five quadrangular apertures, which look from a distance like square port-holes, or embrasures, for heavy cannon, but which prove upon closer examination to be doors leading to huge subterranean chambers, designed, I presume, for the safekeeping of ammunition and explosives. At the time when I went through them they contained nothing more dangerous than condemned shovels and pickaxes, empty bottles, old tin cans, metal lamps, dirty straw hats, discarded hammocks, and cast-off shoes. I found nothing in the shape of ammunition except two or three dozen spherical iron cannon-balls, which lay scattered over the rocky floor of the esplanade, as if the soldiers of the garrison had been accustomed to play croquet with them there, just to pass away the time in the intervals between Admiral Sampson's bombardments.