Their agricultural implements, it may easily be surmised, were as rude as their system of farming. The chief of these were the old Scotch plough and the _caschroim_ or crooked spade, which latter, though primitive enough, seems to have been not badly suited to the turning over of the land in many parts of the Highlands. The length of the Highland plough was about four feet and a half, and had only one stilt or handle, by which the ploughman directed it. A slight mould-board was fastened to it with two leather straps, and the sock and coulter were bound together at the point with a ring of iron. To this plough there were yoked abreast four, six, and even more horses or cattle, or both mixed, in traces made of thongs of leather. To manage this unwieldy machine it required three or four men. The ploughman walked by the side of the plough, holding the stilt with one hand; the driver walked backwards in front of the horses or cattle, having the reins fixed on a cross stick, which he appears to have held in his hands.[13] Behind the ploughman came one and sometimes two men, whose business it was to lay down with a spade the turf that was torn off. In the Hebrides and some other places of the Highlands, a curious instrument called a _Reestle_ or _Restle_, was used in conjunction with this plough. Its coulter was shaped somewhat like a sickle, the instrument itself being otherwise like the plough just described. It was drawn by one horse, which was led by a man, another man holding and directing it by the stilt. It was drawn before the plough in order to remove obstructions, such as roots, tough grass, &c., which would have been apt to obstruct the progress of a weak plough like the above. In this way, it will be seen, five or six men, and an equal number if not more horses or cattle, were occupied in this single agricultural operation, performed now much more effectively by one man and two horses.[14]