By Matthew De Cloedt
In early December 1721 James Brydges, the first Duke of Chandos, requested a meeting with Sir Hans Sloane. Brydges, a shareholder in chartered companies operating in New York, Mississippi, and Nova Scotia, wished to gain Sloane’s scientific expertise and advise an expedition of the Royal African Company headed by a “good Botanist” named Mr Hay. Brydges sent Francis Lynn, the company secretary, to Sloane’s residence three days later to answer his questions regarding the venture and to inform him of “the Nature of Drugs, plants, and spices” they were expecting to gather on the expedition.
Though the Royal African Company had lost its trading monopoly after the Glorious Revolution it continued to receive support from prominent individuals. Men like Brydges bet on its success, for the potential financial losses were negligible compared to the possible returns should a profitable, new commodity be discovered. Sloane was a natural choice for Brydges. He was wealthy thanks to his Jamaican interests, well connected to global trade networks, aware of the riches to be gained from botanical commerce, and friendly with the family of Brydges’s wife Cassandra Willughby. Sloane obliged Brydges’ request and directed company officials in Whydah to collect particular plant specimens. 
Sloane regularly received invitations to lend his scientific expertise or invest in business ventures. When he supported a person or company he connected them to a network that included the royal family and contacts around the world. Rejected proposals ended up in his large collection of manuscripts. Some of the more interesting schemes point to what might have been had Sloane seriously backed their proponents.
In the spring of 1716, shortly after he was created baronet, Sloane received a letter from Woodes Rogers asking for all the information he had on Madagascar. The Royal African Company had excluded individual traders from the West African coast, driving them to East African trade centres. English attempts had been made throughout the seventeenth century to establish meaningful trade in Madagascar, which was dominated by the Portuguese and Dutch, but they had little success. Rogers was determined to break into this market.
Rogers had already been a Colonial Governor and privateer in the Bahamas, but wanted to take on a more ambitious project in starting his own colony on Madagascar. There is no evidence that Sloane even replied, but his large library, reputation as a traveler and natural historian, and place within the scientific community attracted Rogers. It would not have been the first time Sloane helped a pirate.
John Welbe wrote several months after Rogers to request Sloane’s assistance. Welbe was in prison for a debt he failed to repay and promised to undertake a voyage to “Terra Australis Incognita” if Sloane helped him. Welbe had long been seeking a patron to support his voyage and forwarded a petition he had written to the Crown of Denmark as evidence. That Sloane was apparently Welbe’s second choice after the Danes indicates how great a patron he was considered to be, or how desperate Welbe was to be freed from bondage.
The unknown territory had been spotted before, but no serious attempt at settling there had been made. With Sloane’s help, Welbe might have gained the support of others with financial and/or natural historical interests in what became Australia, but nothing came of the plan. There is no evidence Sloane bailed Welbe out of prison or even replied to his letter, but in any case he did not sponsor any voyage to the “Terra Australis Incognita”. It would take another prominent Royal Society member, Joseph Banks, to really put Australia on the map.
With his busy medical practice and duties to the government, Royal Society, and Royal College of Physicians, Sloane was too busy to deal with all of the schemes proposed to him. But the map of the world by 1720 might have looked different if Sloane had chosen to throw the weight of the Royal Society and his social network behind Welbe or Rogers.
Counterfactuals aside, Sloane was an ideal patron for international scientific and commercial expeditions, for he had first hand experience. When he traveled to Jamaica in 1687 he was, like Mr Hay, a “good Botanist” trying to make a name for himself using science, commerce, and foreign travel as the foundation for a successful career. Understanding why Sloane ignored Welbe and Rogers might be simple. The two did acknowledge Sloane’s scientific expertise, but focused on securing his financial support. Sloane was not afraid of making money, but he was equally as interested in the opportunity to contribute to science through exploration and commerce. Appealing to this desire might have been the best approach.
 Larry Stewart, “The Edge of Utility: Slaves and Smallpox in the Early Eighteenth Century”, Medical History 29 (1985), 60-61.