These terraces must not be confounded with the cultivated terraces which are so common in the immediate vicinity of old villages, and are undoubtedly the work of the Roman and mediaeval plough. The lance-pointed terraces or platforms, which form the subject of this paper, are visible on many of the steep hill-sides of the Yorkshire Wold valleys, and many others which have once existed have now been erased by natural or artificial causes. They are quite distinct from any other form of earthworks or hill-side ledges, and where they remain perfect in outline, are remarkably alike both in shape and in size. They are generally found on that side of the valley which faces the morning or the mid-day sun, at about one-third the distance from the foot of the slope, and run parallel with the course of the valley. They are found in some cases as single platforms, in others as double platforms, whilst sometimes there are three or even more terraces running parallel one above another. One end of each terrace is always of full width, while the other end runs out to a fine point; and it is also worthy of note, that when two or more of these ledges are found lying like steps, one above the other, they always have their wide ends in the same direction. When well-preserved, they are found to have a breadth varying from fifteen to twenty-one feet, and a length of one hundred to two hundred yards. I know of ...