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82 THE DIAMOND MINES OF SOUTH AFRICA
tional and common names were supplanted by a new christening in 1779, when Colonel Robert Jacob Gordon, commanding the
garrison at Cape Castle, led
another expedition up the river, and named it Orange in honor of the stadtholder.
Hop's exploring party met a troup of giraffes soon after crossing the Groote River, and won the distinction of furnishing the first skin of a giraffe from South Africa to the Museum of the Univer­sity of Leyden. But except­ing this novel chase there was little to attract the explorers. The sun scorched them relent­lessly in the open desert, and they could nowhere find water except in the deep sand-pits dug by the roving natives. Sometimes there was a shallow puddle
at the bottom of one of these pits, and even when the sand was barely moist, further dig­ging to the under­lying stone would sometimes yield a trickle of water. Still they pushed on stubbornly to the farthest point yet reached from
the Cape, in latitude 260 18' S., before turning back to bring home their discouraging story.
It was thirty years before this advance was outstripped by