A series of implements were collected during the summer and autumn of 1914 from an area of some twenty square miles lying between the Cray Valley and Kingsdown in North Kent. The specimens were not distributed uniformly over this area, but confined more or less to a few localities where they occurred in considerable numbers. It is, moreover, significant that these localities are on high land commanding extensive views of the surrounding country, and especially of the river valleys. The sites were presumably chosen for this and another reason—the local abundance of green-coated flint, a material which was largely employed in the manufacture of implements.

The sites had been inhabited by a succession of peoples who left their implements behind them. Among these the commonest are assignable to the Neolithic period, but Palæolithic implements are by no means rare. There are, moreover, localities where only Palæolithic forms are found, and these all of one pattern, namely, the pointed ovate. Many possess the familiar reversed S twist, and all are deeply patinated, either pure white, pinkish-yellow, or cream.