Some years ago Dr. Blackmore discovered, on top of Laverstock Down, a hitherto unknown series of flint tools, turned up by the plough, which he named ‘Rectangular’. He has pointed out that it is in their extreme simplicity, together with constancy to type, that the skill in making them lies; for the manufacturers of these tools chipped flakes of one pattern, with several particular features, by the hundred. Modern practitioners know how many blows have to be given to knock a flake or a block into a required shape, but these people made one kind of tool with some halfdozen strokes, almost unfailingly, over and over again.