These old engravings show that the planking is in very short pieces so as to avoid marked curves; but, in order to give, all the same, sufficient stiffness to the vessel, many bends became necessary. [Sidenote: II 138] In the old shipbuilding, where the pieces of the planking nailed together clinker ways make the construction more solid, the bends were exceptional. The old “Koggeschepen” (Cogs), for example, had none, but the reproduction of a small boat preserved at the church at Diemer shows them. These wales are then supported by round wooden brackets which are still found in a few old “Poonen”. In the matter of the wales, the rule was that when the vessel was seen from in front they seemed to be convex, with the convexity on top, whereas, seen from the side, they look concave, that is, with the convexity underneath. It has been said in what precedes that the method of ribands (“centen”) was abandoned for large ships, about the middle of the XVIIth century, and that, after that time, work was done from sketches in putting up the frames and in building the ship. The rudder was handled by means of a tiller, and on large vessels this is often held up by a piece of wood (luierwagen) which is still seen on many small inland vessels. In order readily to work the tiller of large vessels, a hole was cut in the poop deck immediately over the free end of the tiller in its middle position. A lever passed upward through this hole and was hung on a pivot of which the axis lay fore and aft. The lower end of the lever was attached to the free end of the tiller while the upper end was loose. By swinging the top of the lever to one side or the other of the ship, a corresponding motion was given to the tiller and so to the rudder. This manœuvre was, naturally, not easy in heavy weather and required assistance. A pulley, around which ran a rope or steering line having one end made fast to the tiller, was set in the deck so as better to operate the rudder. (~Witsen~, p. 274, 2d column.) This rope, which was served by two men, formed with the pulley the precursor of the steering wheel which appeared on the continent in the XVIIIth century, after having been already in use in England, as certain authors try to make out. It is claimed sometimes that the rudder could only swing a little to either side. This, however, is a mistake. ~Witsen~ says, as a matter of fact, p. 58: “The greater the swing of the rudder, the harder is the manœuvre”. It is evident that Witsen would have said nothing about the swing if it had been small. It follows clearly from the quotation from ~Van Yk~ (p. 121) in regard to the “luierwagens” that the helmsman must have put forth a great deal of strength: “Hij (de luierwagen) diend om de Roerpen, aan ’t vooreinde t’ ondersteunen nademaal deze, wegens deszelfs langte, om sig selven te dragen immers _om ’t geweld dat de man_ te Roer daaraan verrichten moet, uit te staan; al te zwak soude wezen”[18].