White and yellow iron pyrites are abundant in the gneissic rock adjoining the limestone, and frequently very fine, perfect crystals may be found handsomely dressed upon the rock.

It cleared up a good many points in my mind concerning the gneissic base rocks, the Beacon sand-stone, and the dolerite intrusions.

At the headlands and in irregular spots the gneissic base rock and portions of moraines lie exposed, offering a succession of interesting spots for a visit in search of geological specimens.