[Illustration: Fig. 54.--Hone (6-1/4 inches in length).] Besides these _hones_ we noticed a large block of a coarse sandstone, having one side covered with deep ruts, supposed to be caused by the sharpening of pointed instruments. _Polished Celt._--Only one polished stone celt was found. It is a wedge-shaped instrument, 5-1/2 inches long, and 2 broad along its cutting edge, which bears the evidence of having been well used, and tapers gently towards the other end, which is round and blunt. It is made of a hard mottled greenstone (Fig. 55). _Circular Stone._--Fig. 56 represents a peculiar circular implement manufactured out of a bit of hard trap rock. It presents two flat surfaces, 3 inches in diameter, with a round periphery, and is 1-3/8 inch thick. [Illustration: Fig. 55.--Stone Celt (1/2).] [Illustration: Fig. 56.--Circular Stone (1/2).] _Querns._--Five upper, and portions of several lower, quern-stones were disinterred at different periods during these excavations, all of which, however--with the exception of the pair found over the log pavement, and an upper stone observed towards the west margin of the crannog, but of which I could find no definite information, as it was stolen soon afterwards,--were imbedded in the débris not far from the site of the fireplaces, and superficial to the level of the middle or first-discovered pavement. Some are made of granite, while others appear to be made of schist or hard whinstone. Besides the central cup-shaped hole, which, of course, all the upper ones possess, one has a second hole slanting slightly inwards, another has a similar hole, but only half-way through, while a third has no second hole at all, and a fourth shows a horizontal depression at its side. The one without a second hole on its surface is nearly circular, but the others are all more or less elongated. Their largest diameters vary from 13 to 14 inches. One is broken into three portions, which, though dug up separately, fit exactly. It measures 14 inches by 11, and the central hole is wide, being no less than 5 inches across. From the upper edge of this hopper-like cavity the stone slopes gently all round to the circumference of its under surface, and the second hole completely perforates it. [Illustration: Fig. 57.--Upper Quern Stone (1/8).] [Illustration: Fig. 58.--Upper Quern Stone (1/8)] [Illustration: Fig. 59.--Lower Quern-Stone (1/8).] _Cup-marked Stones._--Two portions of red sandstone, having cup-shaped cavities about 1 inch deep and 3 inches diameter, were found amongst the débris. One of them was lying underneath a horizontal raised beam at the north side of the crannog. The position of the other was not determined. The latter has two circular depressions or grooves round the cup, the outer of which is about 9 inches in diameter (Figs. 60 and 61). [Illustration: Fig. 60.--Cup Stone (1/8).] [Illustration: Fig. 61.--Cup Stone (1/8).] [Illustration: Fig. 62.--Stone (1/2).]