The first rafts, laid down in this structure, are called the foundation, and are always either of oak, or fir-trees, bound together at their tops, and strengthened with firs, fastened upon them crossways by iron spikes. When this foundation has been carefully compacted, the other rafts are laid upon it, the trees of each being bound together in the same manner, and each _stratum_ fastened to that beneath it. The surface is rendered even; storehouses and other apartments are raised; and the whole is again strengthened by large masts of oak. Before the main body proceed several thin and narrow rafts, composed only of one floor of timbers, which, being held at a certain distance from the float by masts of oak, are used to give it direction and force, according to the efforts of the labourers upon them. Behind it, are a great number of small boats, of which fifteen or sixteen, guided by seven men each, are laden with anchors and cables; others contain articles of light rigging, and some are used for messages from this populous and important fleet to the towns, which it passes. There are twelve sorts of cordage, each having a name used only by the float-masters; among the largest are cables of four hundred yards long and eleven inches diameter. Iron chains are also used in several parts of the structure. The consumption of provisions on board such a float is estimated for each voyage at fifteen or twenty thousand pounds of fresh meat, between forty and fifty thousand pounds of bread, ten or fifteen thousand pounds of cheese, one thousand or fifteen hundred pounds of butter, eight hundred or one thousand pounds of dried meat, and five or six hundred tons of beer. The apartments on the deck are, first, that of the pilot, which is near one of the magazines, and, opposite to it, that of the persons called masters of the float: another class, called masters of the valets, have also their apartment; near it is that of the valets, and then that of the sub-valets; after this are the cabins of the _tyrolois_, or last class of persons, employed in the float, of whom eighty or an hundred sleep upon straw in each, to the number of more than four hundred in all. There is, lastly, one large eating-room, in which the greater part of this crew dine at the same time. The pilot, who conducts the fleet from Andernach to Dusseldorff, quits it there, and another is engaged at the same salary, that is, five hundred florins, or 42 l.; each has his sub-pilot, at nearly the same price. About twenty tolls are paid in the course of the voyage, the amount of which varies with the size of the fleet and the estimation of its value, in which latter respect the proprietors are so much subject to the caprice of customhouse officers, that the first signal of their intention to depart is to collect all these gentlemen from the neighbourhood, and to give them a grand dinner on board. After this, the float is sounded and measured, and their demands upon the owners settled.