Final answer:
Esau Damoense was involved in the discovery of a valuable diamond on De Beers' land, leading to the establishment of the New Rush settlement.
Step-by-step explanation:
Esau Damoense was a significant figure in the diamond industry, particularly in relation to De Beers. He played a role in the early years of De Beers, being involved in the discovery of a valuable diamond on De Beers' land. This discovery led to the establishment of the New Rush settlement, which eventually became the town of Kimberley in South Africa.