During the season of these operations the rivers and streams are frozen up; but in spring, when the melting of the ice renders them navigable, preparations are made for transporting the timber from the mills to the shipping ports. If the mill be on the banks of a small stream, the lumberers make up the logs and planks into rafts, the dimensions of which are suited to the capacity of the stream, and when these reach a larger stream into which the smaller one empties itself, the small rafts are broken up and re-arranged into larger ones; but if the mill be on the banks of the larger stream, the timber is at once made up into the rafts which float down to the shipping port--three or four hundred thousand feet of timber being sometimes conveyed in one raft. Sometimes the streams are too small to admit the rafts to float down them: and in such case they often lie aground for months, until an accidental flooding increases the body of water; or else they have to be broken up altogether, and other means adopted for conveying them to market. The rafts are generally put together very slightly, the value of labour being high, and the lumberers regulating the strength of the raft only in proportion to the distance which it has to float. This distance may vary from fifty to three or four hundred miles. Some one of the lumberers who may happen to be best acquainted with the stream acts as pilot, all the others following his directions in the navigation. The raft moves just as fast as the stream will convey it, be it slow or quick, no acceleration of speed being attempted by sails or oars; so that the time which elapses before the raft reaches its destination depends on many different circumstances. In some instances, where all the circumstances are favourable, the pilot navigates his cumbrous raft night and day without stopping; but if there are difficulties, he directs it into some cove or sheltered place during the night. The men are provided with long poles, by which they can regulate the position of the raft in the stream, keeping it either in the middle of the current or near the bank. The men seldom trouble themselves to make huts or cabins on the rafts: for the weather being spring, and it being optional to them to go on shore when they please, they make very few arrangements for their trip except in provisions. On the St. Lawrence, however, where the French Canadians bring down timber-rafts to Quebec for shipment, the men erect small huts or temporary dwellings on the rafts, since the voyage becomes of a more serious character.