"At Achim [Aceh] every one is for selling himself. Some of the chief lords have not less than a thousand slaves, all principal merchants, who have a great number of slaves themselves. …This is the true and rational origin of that mild law of slavery which obtains in some countries: and mild it ought to be, as founded on the free choice a man makes of a master, for his own benefit; which forms a mutual convention between the two parties."