West India merchant? (Colonial - Caribbean)
James Hammond identified his partners as John Banister and William Manning in his will of 1771. Banister & Hammond appear in correspondence with Samuel Martin in 1767.
BL, Add. Mss 41350, Samuel Martin to [Banister & Hammond], 30 Jun. 1767, in Spike Sweeting, 'Capitalism, the State and Things: the Port of London, circa 1730-1800', unpublished PhD thesis University of Warwick 2014.