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tion of the island not possessed by the princely house of Hamilton. 

 The Statistical Account informs us that the grant of the lands of 

 Kilmichael was made by King Robert Bruce for services rendered 

 by an ancestor of the Fullarton family, called MacLuoy or MacLewis 

 a name only now preserved in the designation of the glen. But 

 this statement is not correct: Bruce had no lands in Arran to 

 bestow, the whole island, except some church property, then 

 belonging to the Stewart family. The grant was made by King 

 Robert III., who belonged to this family, about the year 1391 ; 

 and the charter then given is still extant. The Hamilton family 

 acquired the greater part of the island by marriage in 1474. Arran, 

 erected into an earldom a short time before, was given as dowry with 

 the Lady Mary, sister of James III., on her marriage with the Lord 

 Hamilton. 



The front of Windmill hill is formed, through about half its 

 height, of columnar felspar porphyry, similar to that of Dun-Dhu, 

 already described (Art. 77). The columns are four, five, and six- 

 sided, with flat jointings ; the pillars lean in various directions. The 

 junction with the sandstone below is nowhere visible. About the 

 middle of the front of the hill, a mass of altered sandstone, 12 

 feet wide, is imbedded in the porphyry. Close to this is a whin 

 dike, running 10 N. of E. Several others traverse the ridge of 

 porphyry another example of the posteriority of the common trap 

 or whinstone to all the rocks of Arran. The plane of contact 

 between the sandstone and porphyry gradually ascends westward, 

 and, on reaching the S.W. shoulder of the hill, we find a wedge- 

 shaped mass of sandstone connected with the body of this rock 

 below, and apparently separating the porphyry from the granite 

 which immediately succeeds. No true contact of these rocks is 

 observable. Sandstone, slaty pieces of porphyry, granite sand, and 

 bits of granite are seen lying about, mixed up confusedly, and no 

 line of demarcation can be laid down. Presently the hill-side shows 

 granite only. Eastwards all the high ridge of Windmill hill is 

 porphyry; sandstone is seen at the north base, but no contact is 

 visible. The base of the porphyry is an intimate mixture of felspar 

 and quartz, of a gray or bluish-gray colour, with imbedded felspar 

 crystals, bits of quartz, and occasionally well formed crystals of this 

 substance. We have already (Art. 50) described at sufficient length 

 the relations of the sandstone to the Ploverfield granite, to this 

 porphyry, and the syenite of the hill-sides westwards, into which 

 the granite seems to shade off; and need not now recapitulate. The 

 series forms an interesting study. The granite, porphyry, and syenite, 



