6. Another mass of whitish sandstone, of a semi-globular shape, having a cup-shaped cavity on its flat surface, must also be included under this heading. The diameter of the cup is 5-1/2 inches, and its depth 2-1/2 inches. The rest of the flat surface all round the margin of the cup is smoothed and striated, evidently caused by the sharpening of tools. The cup itself was not used for this purpose, as the marks of the puncheon by which it was chiselled out are distinctly seen. Its probable use was to hold water, so essential to the sharpening of metal tools. _Cup Stone._--A small cup stone found in the interior of the crannog. The stone is smooth on its upper and under surfaces and on one side, but the other sides are irregularly shaped. The cup itself is quite smooth and circular, and looks as if it had been used as a small mortar. Its diameter is only 1 inch, and depth half an inch (Fig. 195). [Illustration: Fig. 195.--Fragment of Stone, with a cup-shaped Cavity (1/1).] _Querns._--Only two upper quern-stones, both of which are in a fragmentary condition. One was made of a fine quartz conglomerate, and, by putting the fragments together, it was ascertained that it measured 18 inches by 17 inches. It was flat, and more of a millstone shape, and the central hole was large (3 inches in diameter), circular, and not tapering. For the insertion of a handle there was a small square-shaped hole at its margin. Portion of another quern made of whinstone, and of the usual type, indicates a medium size, of about 1 foot across. [Illustration: Fig. 196.--Spindle Whorl (1/1).] [Illustration: Fig. 197.--Spindle Whorl (1/1).] _Spindle Whorls._--A small spindle whorl neatly made of coarse shale. It is flat and circular, and has a diameter of 1 inch (Fig. 196). Another perforated little object, of smaller dimensions than the former, is made of cannel coal (Fig. 197). _Flint Objects._--Two views of a portion of a curved flint knife, which has been much used, are here given (Fig. 198). Another small flint implement like a scraper is figured, because it exhibits one side which has been artificially polished (Fig. 199). Fig. 200 represents a small central core, neatly chipped all round. There is another large core of flint 3-1/4 inches in diameter, from which many flakes appear to have been struck off. Besides the above there were found a small portion of a finely chipped scraper, and a large quantity of broken flints and chips. [Illustration: Fig. 198.--Flint Implement (1/1).] [Illustration: Fig. 199.--Polished Flint Implement (1/1).] [Illustration: Fig. 200.--Flint Core (1/1).]