When the evening came, we were again upon the larboard tack, making, perhaps, some four knots in the hour; though, had we been in proper rig, and with a clean bottom, we had been making eight or nine, with so good a breeze and so calm a sea. Yet, so far, our progress had been very reasonable; for the island lay, maybe, some five miles to leeward, and about fifteen astern. And so we prepared for the night. Yet, a little before dark, we discovered that the weed-continent trended out towards us; so that we should pass it, maybe, at a distance of something like half a mile, and, at that, there was talk between the second mate and the bo'sun as to whether it was better to put the ship about, and gain a greater sea-room before attempting to pass this promontory of weed; but at last they decided that we had naught to fear; for we had fair way through the water, and further, it did not seem reasonable to suppose that we should have aught to fear from the habitants of the weed-continent, at so great a distance as the half of a mile. And so we stood on; for, once past the point, there was much likelihood of the weed trending away to the Eastward, and if this were so, we could square-in immediately and get the wind upon our quarter, and so make better way. Now it was the bo'sun's watch from eight of the evening until midnight, and I, with another man, had the lookout until four bells. Thus it chanced that, coming abreast of the point during our time of watching, we peered very earnestly to leeward; for the night was dark, having no moon until nearer the morning; and we were full of unease in that we had come so near again to the desolation of that strange continent. And then, suddenly, the man with me clutched my shoulder, and pointed into the darkness upon our bow, and thus I discovered that we had come nearer to the weed than the bo'sun and the second mate had intended; they, without doubt, having miscalculated our leeway. At this, I turned and sang out to the bo'sun that we were near to running upon the weed, and, in the same moment, he shouted to the helmsman to luff, and directly afterwards our starboard side was brushing against the great outlying tufts of the point, and so, for a breathless minute, we waited. Yet the ship drew clear, and so into the open water beyond the point; but I had seen something as we scraped against the weed, a sudden glimpse of white, gliding among the growth, and then I saw others, and, in a moment, I was down on the main-deck, and running aft to the bo'sun; yet midway along the deck a horrid shape came above the starboard rail, and I gave out a loud cry of warning. Then I had a capstan-bar from the rack near, and smote with it at the thing, crying all the while for help, and at my blow the thing went from my sight, and the bo'sun was with me, and some of the men.