70 About where this column in 75 is inserted in the map there is plenty of Archaean on this east, The contact line seems to run more easterly. A valley two mile off the Archaean and quite a short way west of this is a large exposed Cambrian shaly slate, in places almost a sandstone, with limestone in the west, and then more of the shaly slate. The strike here is again much as at 69 mls perhaps a little more northerly and the N/S is about 40 W. Both were not taken by instruments. The eastern foot of the hill from 69 northwards does not claim any exposure excepting trace of Archaean strata. I did not consider it very necessary to trace the Cambrian farther northwards.