Archaeological essays . hurch at Killaloe, belonging probably to the tenth century,will explain how this was generally managed. The nave was roofed ^ See his Illustrated Handbook of Architecture, vol. ii. \). 918.* [Was.—P.] t [But now considers as of tlie tenth or perhaps eleventh,—P.] IN THE ISLAND OF INCHCOLM. 117 with a tunnel-vault with a pointed one over it, on which the roofingslabs were laid. Mr. Fergusson adduces Cormacs Cliapel on theEock of Cashel, St. Kevins Plouse or Kitchen at Glendalough, whichhe thinks may belong to the seventh century; and St. ColumbasHouse at Kells, and sever


Archaeological essays . hurch at Killaloe, belonging probably to the tenth century,will explain how this was generally managed. The nave was roofed ^ See his Illustrated Handbook of Architecture, vol. ii. \). 918.* [Was.—P.] t [But now considers as of tlie tenth or perhaps eleventh,—P.] IN THE ISLAND OF INCHCOLM. 117 with a tunnel-vault with a pointed one over it, on which the roofingslabs were laid. Mr. Fergusson adduces Cormacs Cliapel on theEock of Cashel, St. Kevins Plouse or Kitchen at Glendalough, whichhe thinks may belong to the seventh century; and St. ColumbasHouse at Kells, and several others in various parts of Ireland, asaU displaying the same peculiarity in the stone roofing. Like some oratories and churches in Ireland, more simple andprimitive than those just alluded to, the building on Inchcolm isan edifice consisting of a single vaulted chamber, analogous in formto the over-croft of the larger oratories or minor churches. Theaccompanying section of the old and small stone-roofed church of. Fig. 12. Section of the Church of Killaghy. Killaghy, at the village of Cloghereen, near Killarney, is the resultof an accurate examination of that building by Mr. Brash of stones look better dressed and more equal in size, but other-wise it is so exactly a section of the Inchcolm oratory, that it mightwell be regarded as a plan of it, intended to display the figure and 118 ON A STONE-EOOFED BUILDING mode of construction of its walls and stone roof, formed as that roofis of three layers—viz., 1, The layer consisting of the proper stonesof the arch of the cell interiorly; 2. The layer of outer roofing stonesplaced exteriorly; and 3. The intermediate layer of lime, and gritor small stones, cementing and binding together these other twocourses.* It was once suggested to me as an argument against the Irisharchitectural character and antiquity of the Inchcolm oratory, thatits vault or arch was slightly hut distinctly pointed, and that pointedarches did no


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Keywords: ., bookcentury1800, bookdecade1870, booksubjectarchaeology, bookyear