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76 THE DIAMOND MINES OF SOUTH AFRICA
parent cessation of enterprise there was a continuous progress, almost essential to the successful advance of later exploration. The Dutch settlement at the Cape was expanding. Year after year pioneer settlers pushed out farther from the Castle, moving
up the river valleys, and cling­ing at first to the base of hill ranges where the essential sup­ply of water was most surely attainable. After the taking up of the choice locations, later comers passed on over the open veld, and it was seen that there were large tracts of land, un-suited to agriculture, which would serve well as ranges for cattle and sheep.
For many years, however, the raising of wheat was of prime importance in the eyes of the