LOCAL RESEARCHES AND DESCRIPTIONS. 123

long extending surface is 372 feet above the sea. Ityields, however, in broadness and distinctness to oneprojecting from the skirts of Mealderry Hill, at theangle between Glen Roy and Glen Spean, bearing ahamlet called Achnaderry. This is 392 feet, corres-pondent of course with the mass atBrecklech. Fartherup Glen Roy, the bottom of the valley is filled toa great height with these alluvial masses, insomuchas to have appeared to some as in no small degreediminishing the difficulty as to barriers in that glen.One, on the front of which Boliinia village is situated,is 520 feet above the sea. Returning to Glen Spean—In this valley, at Monessie, the river passes througha profound rocky chasm, forming a romantic pieceof natural scenery. A little way down the glen, atthe Catholic chapel, we see, on the opposite side ofthe river, a terrace which I learn, from the measure-ments of the survey, to be 428 feet. A little wayonward, below Monessie village, there appears an-other at 446 feet. HJext comes a flat gravel-fieldoverlying a promontory of rock, round which thechasm pursues a curvilinear course: this is 504 feet,but its being a marking of the margin of the sea Iconsider as doubtful. On both sides of Glen Spean,at Monessie, we find huge protuberances of detritalmatter starting out from the hills, and generallyassuming in combination a rude terrace-like form,at 534, 627, and 734 feet. In the last case, on