Amongst the objects of bone belonging to the Late-Celtic period the most remarkable are the spatulæ, or flakes, of which no less than 5,000 are said to have been derived from cairn H of the Slieve-na-Caillighe series, near Oldcastle, Co. Meath. These chambered cairns were in the first instance erected as burial-places at the end of the Neolithic Age or the beginning of the Bronze Age, and the one marked H on the plan given in the _Proc. Soc. Ant. Scot._ (vol. xxvi., p. 294) appears to have been used as a workshop by an artificer in bone during the Early Iron Age. Ninety-one of the bone spatulæ from the cairn in question were engraved by compass, with circles, curves, and ornamental puncturings, and twelve were decorated on both sides. Unfortunately the whole of the bones have been lost, and we only know what they were like from the illustrations in E. Conwell’s _Tomb of Ollamh Fodhla_ (p. 53). A fragment of one of these bones which had been overlooked by the previous explorers of the cairn has recently been brought to light by Mr. E. Crofton Rotheram.[255] Perhaps the most interesting feature connected with the bones from Slieve-na-Caillighe is the discovery with them of the pair of iron compasses used in producing the incised designs upon them. [255] _Journ. R. Soc. Ant. Ireland_, ser. 5, vol. vi., p. 257. Besides the bones just described, the other principal objects of the same material belonging to the Late-Celtic period are certain toilet-combs and spoon-shaped fibulæ, or dress-fasteners. Bone combs with Late-Celtic ornament have been found on the inhabited site at Ghegan Rock, near Seacliff, Haddingtonshire, and in the crannogs at Lagore,[256] Co. Meath, Ballinderry,[257] Co. Westmeath; and at Longbank crannog on the Clyde, near Glasgow. Spoon-shaped fibulæ of bone have been derived from the Victoria Cave, Settle, the Kelko Cave, Giggleswick, and Dowkerbottom Cave, Arncliffe, Yorkshire. The ornament upon them consists of concentric circles and dots.[258] In addition to wood and bone, the Late-Celtic people used Kimmeridge shale for the manufacture of objects, chiefly turned vases with cordons, like the Aylesford pots previously described. Vessels of this kind have been found at Old Warden,[259] Bedfordshire, Great Chesterford[260] and Colchester,[261] Essex, and Corfe Castle,[262] Dorset. [256] Sir W. Wilde’s _Catal. Mus. R.I.A._, p. 271, fig. 176. [257] _Ibid._, p. 271, fig. 177. [258] Prof. W. Boyd Dawkins’ _Cave-Hunting_, pp. 91 and 131. [259] “On the Materials of Two Sepulchral Vessels found at Warden, Co. Beds”, by the Rev. J. S. Henslow (_Cambridge Ant. Soc. Publ._, 1846). [260] _Archæol. Jour._, vol. xiv., p. 85. [261] Henslow, _loc. cit._, p. 87. [262] _Archæol. Jour._, vol. xxv., p. 301. STONEWORK