Brown began his career as an estate
bookkeeper He also grew sugar and owned the Antrim, Colliston, Grier Park, and Minard plantations, all in St Ann, as well as having interests in numerous others. He was a member of the
House of Assembly of Jamaica in 1820 and represented Saint Ann Parish in that assembly for 22 years. According to the
Legacies of British Slave-Ownership at the
University College London, Brown was awarded a payment under the
Slave Compensation Act 1837 as a former slave owner in the aftermath of the
Slavery Abolition Act 1833. The British Government took out a £15 million loan (worth £ in ) with interest from
Nathan Mayer Rothschild and
Moses Montefiore which was subsequently paid off by the British taxpayers (ending in 2015). Brown was a prolific slave owner in the context of Jamaican society and was associated with a large number of claims, twenty-five in total, he owned 1,120 slaves most of them on
sugar plantations in
Saint Ann Parish and received a £24,144 (equivalent to £ in ) payment at the time. Brown was active in trying to recruit Ulster Protestant people to work in Jamaica. In December 1835, 121 people from
Ballymoney, Co. Antrim, set off from Belfast for Jamaica on the
James Ray, a
brig owned by Brown. They settled in St Ann. In 1836 he brought a further 185 ulster protestant people to Saint Ann. An effort by planters in 1840 to encourage large-scale protestant migration to Jamaica to settle lands that might otherwise be occupied by newly freed slaves, failed after the project was criticised in Ireland as potentially transforming the migrants into slaves. ==Death and legacy==