of the earth are capable, may be expected". The major alternative to Botany Bay was sending convicts to Africa. From 1775 convicts had been sent to garrison British forts in west Africa, but the experiment had proved unsuccessful. In 1783, the Pitt government considered exiling convicts to a small river island in Gambia where they could form a self-governing community, a "colony of thieves", at no expense to the government. In 1785, a parliamentary select committee chaired by Lord Beauchamp recommended against the Gambia plan, but failed to endorse the alternative of Botany Bay. In a second report, Beauchamp recommended a penal settlement at Das Voltas Bay in modern Namibia. The plan was dropped, however, when an investigation of the site in 1786 found it to be unsuitable. Two weeks later, In August 1786, the Pitt government announced its intention to send convicts to Botany Bay. The Government incorporated the settlement of Norfolk Island into their plan, with its attractions of timber and flax, proposed by Banks's Royal Society colleagues, Sir John Call and Sir George Young. There has been a longstanding debate over whether the key consideration in the decision to establish a penal colony at Botany Bay was the pressing need to find a solution to the penal management problem, or whether broader imperial goals — such as trade, securing new supplies of timber and flax for the navy, and the desirability of strategic ports in the region — were paramount. Leading historians in the debate have included Sir Ernest Scott, Geoffrey Blainey, and Alan Frost. The decision to settle was taken when it seemed the outbreak of civil war in the Netherlands might precipitate a war in which Britain would be again confronted with the alliance of the three naval Powers, France, Holland and Spain, which had brought her to defeat in 1783. Under these circumstances a naval base in New South Wales which could facilitate attacks on Dutch and Spanish interests in the region would be attractive. Specific plans for using the colony as a strategic base against Spanish interests were occasionally made after 1788, but never implemented. Macintyre argues that the evidence for a military-strategic motive in establishing the colony is largely circumstantial and hard to reconcile with the strict ban on establishing a shipyard in the colony. Karskens points out that the instructions provided to the first five governors of New South Wales show