On the antiquity of the Irish crannogs, Sir W. R. Wilde writes as follows:--"Certainly the evidences derived from the antiquities found in ours, and which are chiefly of iron, refer them to a much later period than the Swiss; while we do not find any flint arrows or stone celts, and but very few bronze weapons, in our crannogs. Moreover, we have positive documentary evidence of the occupation of many of these fortresses in the time of Elizabeth, and some even later."--(_Proceedings of Royal Irish Academy_, vol. vii. p. 152.) Subsequent researches, however, have shown that all the desiderated articles above mentioned have been found on crannogs. For instance, amongst the remains described by Mr. Shirley, from the crannogs in MacMahon's country, are stone celts, an arrow-head of flint, two arrow-heads of bronze, three looped bronze celts, bronze knives, etc.;[8] and G. H. Kinahan, Esq., M.R.I.A., thus concludes a short notice on Irish Lake-Dwellings, contributed to Keller's book (2d edit. p. 654):--"Of the time when the crannōgs were first built there is no known record, but that they must have been inhabited at an early period is evident, as antiquities belonging to the stone age are found in them. Some were in use up to modern times, Crannough Macknavin, County Galway, having been destroyed in A.D. 1610, by the English, while Ballynahuish Castle was inhabited fifty years ago. Some crannōgs seem to have been continuously occupied until they were finally abandoned, while others were deserted for longer or shorter periods. In Shore Island, Lough Rea, County Galway, there is a lacustrine accumulation over 3 feet thick, marking the time that elapsed between two occupations. "In Wakefield's Island, A.D. 1812, attention was directed to a crannōg in Lough Nahineb, County Tipperary; but to the late Sir W. R. Wilde, M.D., is due the credit of bringing these structures prominently under public notice. This observer records forty-six crannōgs (_Catalogue, Royal Irish Academy_, vol. i. p. 220 _et seq._), but since then twice as many have been recorded, most of which are described in the publications of the Royal Irish Academy, or kindred Societies; but a systematic classification of the crannōgs has yet to be made." CONTINENTAL LAKE DWELLINGS.