(See vol. ii. p. 635). Within the last few months there has been discovered by Mr. Crichton another sculptured stone on Inchcolm. But the character of the sculptures on it is still uncertain, as the stone is in a dark corner, the exposed portion of it forming the ceiling of the staircase of the Tower, and the remainder of the stone being built into, and buried in the wall. The sculptures are greatly weather-worn, and the stone itself had been used in the original building of the Tower. The Tower of St. Mary's Church, or of the so-called Cathedral at Iona, is known to have been erected early in the thirteenth century. Mr. Huband Smith, who believes the Tower of the Cathedral in Iona, and perhaps the larger portion of the nave and aisles, to be "probably the erection of the twelfth and next succeeding century," found, in 1844, on the abacus of one of the supporting columns, the inscription "DONALDUS OBROLCHAN FECIT HOC OPUS;" and already this inscription has been broken and mutilated.--(See Ulster _Journal of Archaeology_, vol. i. p. 86.) The obit of a person of this name, and probably of this builder, occurs, as Dr. Reeves has shown, in the _Annals of Ulster_ in 1203, and in the _Annals of the Four Masters_ in 1202; and Dr. Reeves considers the Church or Cathedral at Iona as "an edifice of the early part of the thirteenth century."--(_Life of Columba_, pp. 411 and 416.) But the Tower of the Church of Inchcolm is so similar in its architectural forms and details to that of Icolmkill, that it is evidently a structure nearly, if not entirely, of the same age; and the new choir (novum chorum) built to the church in 1265 (see _Scotichronicon_, lib. x. c. 20) is apparently, as seen by its remaining masonic connections, posterior in age to the Tower upon which it abuts. Hence we are, perhaps, fairly entitled to infer that this sculptured stone thus incidentally used in the construction of the Tower on Inchcolm, existed on the island long, at least, before the thirteenth century, as by that time it was already very weather-worn, and consequently old.[46]]