EARTHWORKS AND STANDING STONES. 173 earthworks and tumuli at Denton, marked on the map as Saxon remains, but probably of earlier date. (c) In an old map of the parish boundaries preserved at the Chaucer Institute, Bungay, several "big stones," " dole stones," etc., are marked. I have been unable to trace them; but a careful search might be rewarded with further links or subsidiary alignments. One such stone appears to have existed in what is locally known as Shoedevil Lane. In Scotsman's Lane a tumulus exists, and several others, besides earthworks, are in the neighbour- hood of Mettingham Castle. An earthwork in the park of Kirby Cane Hall might possibly be related. These, however, are only to be regarded as hints for future enquiries, and are not intended to support the main alignment which is the subject of this note. I have compared the earthwork on Broome Heath with that which encircles Stonehenge. May it not perhaps be the case that a stone circle formerly existed within the earthen enclosure ? I am inclined to think that a trial trench would probably reveal traces of such a stone circle under the turf. In a district where stone is scarce it is not wonderful that useful stone blocks have disappeared. I almost persuaded myself that I had located one at least of the stones by means of a steel probe.

FURTHER NOTE ON WORKSHOP FLOOR NEAR PORTHCURNO. BY J. G. MARSDEN. Read at Norwich, December 13th, 1915.

At the meeting held last December there was read a short note on a " Workshop Floor near Porthcurno, Cornwall." During the past summer I dug up some of the ground round this site and obtained about 1000 pieces of flint; generally they were sparsely scattered, but here and there considerable numbers were found close together. In character and condition they were similar to those previously obtained, though it was noticeable that more implements and well-shaped flakes prevailed. In the previous note no mention was made of the finding of:— 1. Six unbroken flint nodules, of which five had the crust rolled and battered. These may have come from one of the beaches in the district, where such nodules are to be found, though elsewhere rare. 2. Several long flat pieces of fine grained grit with naturally- rounded sides and ends. Three of these had one end bevelled. Recently one having both ends bevelled has come to hand. Perhaps they are Rubbers. Most of the specimens now exhibited were obtained in the later diggings. Mr. Reginald Smith kindly examined some of them, and his remarks, in inverted commas, are included in the descriptions. Dimensions are given in inches. 174 PROCEEDINGS OF THE PREHISTORIC SOCIETY.

PLATE XXXVI. 1. Cone, with large fan-shaped spur which is flanked by notches. Two bold flakes struck from the back and side are truncated by a flaw and have not carried through from base to apex, thus spoiling the symmetry of the Cone. Base 2 by 1, height 2\. • 2. An exceptionally small Cone with spur." Base J by f, height |.(< • 3. " Steep plane, undercut through continued use or sharpen- ing." Back and top crusted. Base 2\ by If, height l|. 4. Conical plane, with patch of crust on top and an unusual amount of gloss on the worked sides. Base 2 by li, height 1|. 5. " Conical implement, with central and two lateral spurs, like the Dolphin in Grime's Graves Report, Fig. 31 combined with Fig. 51." Base li by \\, height \\. This is made of whitish flint with small black specks running through. A flake which looks like a graver has been struck from one side of it; and probably the Borer, PI. XXXVII., Fig. 9, and some other flakes come from the same core. 6. Conical plane, with engrailed edge and crusted back. Base If by if, height \\. 7. Conical steep plane, with long parallel flaking on the face ; from half-way up the crusted back has been struck a tangential flake reaching the apex, there forming a second, acute-angled, plane. Base 1 by f, height If. 8. " Sub-conical plane, with crusted back." Base 1 by \, height l\. 9. Scraper made from a square ridged flake, one bevel crusted. In the centre of the working edge is a spur flanked on each side by three contiguous notches, the first and largest on the working edge, the second and smallest at the corner, and the third on the side. Base li by \\. 10. Scraper, "not a very pronounced keel, rather a nosed implement." Base \\ by if, height \. 11. " Spurred plane, but back premises altered; note gloss." Base 1 by f, height if. 12. Steep faced Scraper, with crusted central ridge ; of chert, patinated blue. Base f to li by 1|, height f.

PLATE XXXVII. 1. Battered back knife, cutting edge used. 2. " Battered back (a dos abattu), Dr. Sturge's type No. 1." 3. " An exceptionally broad flake, used especially at squared end." 4. Ridged flake, with curved back, used straight cutting edge and butt facetted. 5. Blade used slightly along the sides and as scraper at crusted, end. 6. Ridged flake, with signs of use on both faces. Plate XXXVI.

I

Photo by\ [Gibson & Sons, Penzance. Implements from Floor at F'orthcurno. ^. All top view, except 7 and 1 I side, and 8 front. Plate XXXVII.

10

Phntn by] [h'ibson <(- Stum, Implements from Floor at Porthcurno. '-' WORKSHOP FLOOR NEAR PORTHCURNO. 175

7. Battered back knife, resembling Dr. Sturge's type No. 2. A notch, perhaps for the thumb, has been worked on the cutting- edge near the butt. Length 2f, thickness of back \. 8. " A strong point as if for graving, but not a typical graver." 9. A Borer. 10. Possibly a lateral graver. The work at top of implement is battered and near it a notch has been chipped out of the crusted back. This is slightly iron-stained and therefore quite exceptional for this site. 11. A long thin blade, slightly used. 12. Small pointed ridged flake with broad butt and cutting edge used. 13. Small battered back knife, length f, breadth fV> thickness of back TV- Cutting edge used except near butt. 14. Arrowhead, which I looked upon as, and Mr. Reginald Smith hopes is, an intruder. Like many other pieces from the floor, it has spots of gloss on its surface, which otherwise seems comparatively new. In addition to the above are shewn :—Five Conical implements with spurs; 3 Conical planes, one with bevelled base; a double plane, shaped somewhat like the keystone of an arch; 3 small scrapers, one nosed, one spurred, one " a good example of the engrailed edge," which appears to be a re-chip; " an implement that reminds one of the Walnut type, two convex faces"; a hollow scraper; " a sub-triangular flake, thickest near the point;" two battered backs, and a few small used flakes. Most of the specimens are more or less patinated, and many are spattered with splashes of gloss. It seems highly probable that this floor-is of Aurignacian date, and that it has remained undisturbed, on or just below the surface, from the time of its abandonment until the present. There are indications that other similar stations exist in the neighbourhood, but the contents of those so far observed have been scattered and damaged by farming operations.

THE PLIOCENE DEPOSITS OF THE SOUTH-EAST OF ENGLAND. BY W. J. LEWIS ABBOTT, F.G.S., F.R.A.I. Read at Norwich, December 13th, 1915.

Several members having suggested to me the desirability, in these days of Zeppelin possibilities, of bringing before the Society an account of some of the additions to our knowledge of Wealden geology, which have accumulated during recent years, especially recently, before they are lost; I trust what I have to offer will prove of interest. Personally I would rather have waited until I