During 1935 the Whitehall Company of New York opened a new pit in the old Ruggles pegmatite, at the top of the mountain where the pegmatite is 300 feet wide. Formerly this mineral deposit had been opened at lower elevations by a series of pits, open cuts, shafts and drifts, in search for mica. The location is 1½ miles N. 40° W. from Grafton Center (71°59′33.6″ W. Long., 43°35′22.3″ N. Lat., Cardigan quadrangle, New Hampshire). The locality is easily reached by a road; the distance from the village is three miles.

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