From what has been already written about lifeboats being hurled against wrecks and rocks, it must be evident that the strength of ordinary boats would not suffice. In order to give them the requisite strength of frame for their tremendous warfare, they are built of the best Honduras mahogany, on what is known as the diagonal plan--that is, the boat has two distinct "skins" of planking, one set of planks being laid on in a diagonal position to the others. Moreover, these planks run from one gunwale round under the boat to the other gunwale, and have a complete layer of prepared canvas between them. Thus great strength and elasticity are combined, so that the boat can stand an inconceivable amount of battering on wreckage, rocks, or sand, without being destroyed. That this is really so I will endeavour to prove by referring in the next chapter to a particular instance in which the great strength of one of our lifeboats was powerfully illustrated. It may be added, in conclusion, that the oars of a lifeboat are short, and so made as to combine the greatest possible strength with lightness. They are fastened to the gunwale by short pieces of rope, and work in a moveable iron crutch on an iron thole-pin. Each boat is provided with a set of spare oars. Her equipment of compass, cables, grapnels, anchors, etcetera, is, as may be supposed, very complete, and she rides upon the storm in a rather gay dress of red, white, and blue, in order that she may be readily distinguished from other boats--her lower parts being white, her upper sides blue, and her line of "fender" all round being scarlet. CHAPTER FIVE. MORE TALES OF HEROISM. If any one should doubt the fact that a lifeboat is _all but_ indestructible, let that sceptical one read the following tale of wreck and rescue. On a terrible night in the year 1857 a Portuguese brig struck on the Goodwin Sands, not far from the lightship that marks the northern extremity of those fatal shoals. A shot was fired, and a rocket sent up by the lightship. No second signal was needed. The Ramsgate men were, as usual, keeping a bright lookout. Instantly they jumped into the lifeboat, which lay calmly floating in the harbour alongside the pier. So eager were the men to engage in the deadly struggle that the boat was over-manned, and the last two who jumped in were obliged to go ashore again. The tug _Aid_ was all ready--according to custom--with steam up. She took the boat in tow and made for the mouth of the harbour. Staggering out in the teeth of tide and tempest they ploughed their way through a heavy cross sea, that swept again and again over them, until they reached the edge of the Goodwins. Here the steamer cast off the boat, and waited for her while she dashed into the surf, and bore the brunt of the battle alone.