Letter from J [John] Gwyn Jeffreys, Ware Priory, Hertfordshire, to [Joseph Dalton Hooker], President of the Royal Society Recommending further exploration and research into the North Atlantic by Gibraltar and below England's coastline. Jeffreys makes reference to the Norwegians' progress near Iceland and Jan Mayen island in terms of deep-sea investigations. He requests Council apply to the Admiralty for use of a ship for these purposes. 1 December 1877