Note (return) — Chapter XIV · VOYAGE ROUND THE WORLD, BY CAPTAIN GEORGE ANSON, IN THE YEARS 1740-1744.1 (continued 2)

The examining the bottom of rivers and beds of torrents, and the washing the gold there found, from the sand and dirt with which it is always mixed, are performed by slaves, who are principally negroes, kept in great numbers by the Portuguese for this purpose. The regulation of the duty of these slaves is singular, as they are each of them obliged to furnish their master with the eighth part of an ounce of gold daily.6 If they are either so fortunate or industrious as to collect a greater quantity, the surplus becomes their own property, and they may dispose of it as they think fit; so that some negroes, who have accidentally fallen upon rich washing-places, are said to have themselves purchased slaves, and to have lived afterwards in great splendour, their original master having no other demand upon them than the daily supply of the before-mentioned eighths; which, as the Portuguese ounce is somewhat lighter than our troy ounce, may amount to about nine shillings sterling.