Object
Grey's 3,500 Guineas (Prisoner Delivery Payment)
A real sum of gold coins directed by Grey to Perkins as payment for delivering Jacobite prisoners to slave plantations. This transaction represents Grey's corrupt profits from the slave trade and is the basis for the Doctor's subsequent counter-demand of 10,000 guineas.
2 appearances
Purpose
Transactional payment for delivery of prisoners to plantations
Significance
Locks in Grey's profiteering from Jacobite captives, exposes his vulnerability to the Doctor's manipulation, and escalates escape stakes for the TARDIS crew
Appearances in the Narrative
When this object appears and how it's used