cliv Journal of Proceedings. Mr. Meldola made some remarks upon the chemical nature of the change which had taken place in these grains. They were quite car- bonised, and yet retained the form and consistency of fresh grain. The President said, that as the Essex Field Club was much interested in any examination of pre-historic pits which might throw light on the mysterious Deneholes near Grays and elsewhere, he would say a few words about the well-known Pen Pits, which he had recently visited, Mr. H. B. Woodward, of the Geological Survey, having taken him and Mr. F. J. Bennett (Geological Survey) to see them. They were near Stourhead, on the borders of Wiltshire and Somerset, and consisted of some hundreds of hollows, mostly cup-shaped, and varying in size from a diameter of 10 ft. and a depth of 5ft., to a diameter of 20 ft. and a depth of 10ft., or thereabouts. These hollows are very close together, and are mainly found on the top of a plateau of Upper Greensand, and more especially on a side of the plateau much intersected by valleys sloping down to that of the Stour. They are also seen in these valleys for a certain distance below the crest of the plateau ; while, looking eastward across the valley of the Stour, a number of similar pits appear on the opposite hill side (which is also Upper Greensand), just below the edge of the plateau. They were aware that there had been much controversy about these pits, Mr. Kerslake and others holding that this pit-covered area was the site of an ancient British hill city, while the excavations of Lieut.-Gen. Pitt Rivers and others have shown, that at all events some of these pits have been used as mines, from which a stone suitable for querns, &c, has been extracted. The adherents of the British hill-city view, however, naturally remark that the same excava- tions may have served at one time as hut foundations, and at another as quarries, and that the value of the negative evidence derived from the non-finding of pottery, bones, &c, may be very easily over-rated, espe- cially when it is remembered how few pits of the many hundreds existing have been examined. But, allowing this, it certainly seemed to him that the position of these holes was utterly fatal to the British city view. Where ancient hill-forts or cities exist, and they abound in the neigh- bourhood, the sites chosen are those to which Nature has given special advantages for that purpose. They are on bold, outlying knolls, or if, for example, on the line of Chalk escarpment, they are found where combes, sloping down in opposite directions, almost isolate the site of the ancient camp. Examples of this kind of camp are Bratton, Battlesbury, Scratchbury, Winklebury, and many others. But the Pen Pits occupy part of a plateau not separated from the unoccupied portion by any natural or artificial ramparts or ditches, and extend down the sides of the valleys just as far as a certain stone crops out and no further, though very much further down the hillside than the boundaries of a hill-city would have been ; while, entirely separated from the mass of the pits, and on the opposite side of the Stour valley, we see pits along the hillside on the horizon of this stone, and nowhere else. It seemed