Mr. Crosbie's estate in Kerry is of 9,913 acres valued by Government at 4,638l., with a present rent roll of 8,500l., thanks to the expenditure of 40,000l. since 1839. As one approaches Ardfert the cabin common in Kerry vanishes to make room for houses well and substantially built of concrete, with whale-back roofs also of concrete. The merit of originally introducing concrete as a building material into this part of Ireland belongs, I believe, to Mr. Mahony, of Dromore, who has employed it largely on his own estate; but Mr. Crosbie was, at least, one of the first to perceive the advantage of using it. With Portland cement and the sand and pebbles of the adjacent sea-shore he has made a concrete village, and given his farmers houses of a kind previously unknown in his neighbourhood. Concrete has several advantages keenly appreciated in Kerry. It is dry--an immense advantage in a humid climate, and floors, ceilings, partition walls, and roofs, are all made of it, as well as the external walls. It also requires very little skilled work, and can be built up by ordinary labourers under proper supervision. Another great advantage is that it can be moulded to any shape and thickness, and is therefore most useful for barns, cowhouses, and feeding stalls. The houses and farm buildings I have seen certainly seem perfect, and have, I am informed, been constructed at about the same price as corrugated iron. Those fond of tracing the genius of a nation in its constructive faculty will probably be amused at finding that the latest work of structural genius in Kerry is a development of that mud-hut order of architecture which has existed here from pre-historic times. But concrete well employed is a very different thing from the dirt-pie or mud-hut idea at the other end of the evolutionary chain.