Francis received preliminary training in Jamaica, and then was sent to an English grammar school. Thence he went to Cambridge University. Only the bare facts of his story remain, like a skeleton, but we can safely argue that he did not disappoint the expectations of his patron to any serious extent, for, when the time came for Francis to return to Jamaica, the Duke of Montague used his influence with some determination to get his protege appointed to a seat in the Council, that his abilities might be fully put to the test. The Governor of the island with whom the Duke had to do was Edward Trelawny, and this shows that Williams returned to Jamaica between 1738 and 1748, for it was between those years that Trelawny held sway. They were stormy times, and Trelawny was a man with anything but a placid temper or compliant views. The famous war of "Jenkin's ear," between Britain and Spain, began in 1738. Porto Bello was destroyed by Vernon and Cartagena was attacked with troops whose base was Jamaica. In fact, Trelawny added a Negro detachment to the army employed.[220] In the quarrels that followed the disastrous failure at Cartagena, Trelawny had even more than his fair share of the cursing, and it is hardly surprising to find that a man of such temper, and amid such storms of fate, was anything but malleable to the Duke's request. The Governor knew his mind, and it was that setting a black man in the Council would excite restlessness among the slave population. The Duke's experiment with Williams was, therefore, not completed as the Duke himself intended it should be.[221]