must however add my suspicions, that when more attention shall have been paid to geological investigations, many of the facts which I have enumerated in various parts of these papers will not appear either so solitary or so extraordinary as they now seem.
I have shown that this limestone is in contact with the syenite, and it is also in contact with trap, since a hill of this substance is found surmounting as well as interfering with it near Loch Eishort. I might therefore proceed to describe these rocks according to the order which I have adopted; but nothing certain is as yet known of their real places, and if, as I imagine, and as I think will appear not only here but on almost every occasion where I have described them, they intrude among the regularly stratified rocks, it will be better to defer the consideration of them, as I have done on other occasions, to the last. Before however finally quitting this limestone I must not omit to mention that a similar one is found occupying the south side of Loch Sligachan in a similar manner, and that it has in all probability the same origin and connections, although I had no opportunity of investigating it to my satisfaction.
Returning to the original point at Loch Eishort we find the series of beds which follows this limestone in contact with it. At the very point of contact there is an interference of the two sets, which is highly satisfactory, as tending to establish their perfectly consecutive nature, and consequently of determining the place of the former limestone without the shadow of a doubt. Where they meet, two or three laminæ of the uppermost limestone alternate with an equal number of the lower one, and they are readily distinguished, because the upper ones being mixed with schist have a superior degree of permanence, and project with a sharp edge on the vertically corroded sides of the subjacent one. The upper limestone is equally to be seen following the under one at Kilbride;
