Making money from plantations meant engaging in the circuit of West India trade regulated through a mercantilist system that protected the interests of the ‘mother country’. Long needed to demonstrate to his metropolitan readership that Jamaica brought great wealth to Britain and that the production of sugar depended on slavery. The circuit of the West India trade connected England, West Africa and the Caribbean through a complex set of relations, at the heart of which sat the merchant house. Long’s Uncle Beeston headed the West India house of Drake and Long in the City of London and Long was well aware of the centrality of merchants and the use of bills of exchange to facilitate the sugar and slavery business. Given the increasing criticism of the conditions of the slave trade by the early 1770s, he attempted to sanitize it. The merchants used legers, accounting and numeracy to distance themselves from the realities of slavery. They controlled the system of credit and debt on which this mercantile capitalist formation depended.