The round tower of Monasterboice is one of the finest in Ireland. Its top has been broken off by lightning, but what remains of it is 110 feet in height. It must have been at least 130 feet high when perfect, which would make it one of the highest of the round towers of Ireland. The mason work is of the very best kind, although the stones are uncut, and were evidently found in the immediate neighbourhood of the tower. There is a peculiarity about this tower which is not to be seen in any other structure of the same kind--it is not quite perpendicular. The author of the great book on ancient Irish architecture, already referred to, says that "it leans to one side on the north-west, and has a very peculiar curve. Where the curve commences a distinct change of masonry is visible. When the tower was built to this height the foundation began to settle down, and when this was perceived the builders very skilfully carried up the building in a nearly vertical line, so as to counteract the tendency to lean and to preserve the centre of gravity." It seems a pity that the Board of Works does not repair this splendid structure, and put a new top of antique model on it; it would be, if perfect, the grandest of Irish round towers. Monasterboice became a ruin many centuries before Mellifont; the latter continued to be a Catholic religious establishment down to the time of Elizabeth, but Monasterboice seems to have been abandoned in the twelfth or thirteenth century. The last notice of it, or any one connected with it, by the Four Masters, is under the year 1122, when they record the death of Fergna, "a wise priest." What caused this famous establishment to be abandoned, or at least to cease to be mentioned in Irish annals at such an early period, seems enveloped in a good deal of mystery. It was plundered more than once by the Danes, and it may be that any wooden buildings it contained were burnt by them and never re-erected, for, like Clonmacnois, what remains of its two churches shows them to have been so small that they could not accommodate any large number of persons. Being so near Mellifont may also have led to its abandonment when the latter place became one of the greatest religious houses in Ireland. If Monasterboice was not so large as Mellifont, its abbots and professors seem to have been greater scholars and harder workers than those of the great monastery. Flann of Monasterboice was one of the most noted literary men of ancient, or rather of mediæval, Ireland, for he flourished in the eleventh century. He is considered one of the most truthful and correct of Irish annalists, and has left behind him important works that have been preserved to the present day.