The First Fleet was a fleet of 11 British ships that brought the first British colonists and convicts to Australia. It was made up of two Royal Navy vessels, three store ships and six convict transports. On 13 May 1787 the fleet under the command of Captain Arthur Phillip, with over 1400 people (convicts, marines, sailors, civil officers and free settlers), left from Portsmouth, England and took a journey of over and over 250 days to eventually arrive in Botany Bay, New South Wales, where a penal colony would become the first British settlement in Australia. Lord Sandwich, together with the President of the Royal Society, Sir Joseph Banks, the eminent scientist who had accompanied Lieutenant James Cook on his 1770 voyage, was advocating establishment of a British colony in Botany Bay, New South Wales. Banks accepted an offer of assistance from the American Loyalist James Matra in July 1783. Under Banks's guidance, he rapidly produced "A Proposal for Establishing a Settlement in New South Wales" (24 August 1783), with a fully developed set of reasons for a colony composed of American Loyalists, Chinese and South Sea Islanders (but not convicts). The decision to establish a colony in Australia was made by Thomas Townshend, Lord Sydney, Secretary of State for the Home Office. This was taken for two reasons: the ending of transportation of criminals to North America following the American Revolution, as well as the need for a base in the Pacific to counter French expansion. In September 1786, Captain Arthur Phillip was appointed Commodore of the fleet, which came to be known as the First Fleet, which was to transport the convicts and soldiers to establish a colony at Botany Bay. Upon arrival there, Phillip was to assume the powers of Captain General and Governor in Chief of the new colony. A subsidiary colony was to be founded on Norfolk Island, as recommended by Sir John Call and Sir George Young, to take advantage for naval purposes of that island's native flax (harakeke) and timber.