Page:Transactions of the Geological Society, 1st series, vol. 2.djvu/40

30 a minute investigation both of the rocks and simple minerals had never been yet instituted, and the arrangement and examination of the high land, the most conspicuous and extensive part of the isle, till remained a field quite unexplored.

The grotesque and unfaithful attempt of Fannin to lay down the mountains in his map of the island published in 1789, can hardly be considered as an improvement upon the much earlier and rough sketches of Collins, Durham and Speed.

From the materials and documents which I collected when in the Isle of Man, I have since my return from Ireland constructed a map chiefly expressive of the features and appearances of the mountainous tract, which I now present to the Society; acknowledging at the same time the able and kind assistance afforded me by Mr. Webster, draughtsman to the Society.

The height of Snei-feldt was a long time ago determined by means of the barometer, by Bishop Wilson, and it has been since