Orwell left London for Jura on 10 April 1947. In July he ended the lease on the Wallington cottage. Back on Jura he worked on "Nineteen Eighty-Four" and made good progress. During that time his sister's family visited, and Orwell led a disastrous boating expedition, on 19 August, which nearly led to loss of life whilst trying to cross the notorious Gulf of Corryvreckan and gave him a soaking which was not good for his health. In December a chest specialist was summoned from Glasgow who pronounced Orwell seriously ill, and a week before Christmas 1947 he was in Hairmyres Hospital in East Kilbride, then a small village in the countryside, on the outskirts of Glasgow. Tuberculosis was diagnosed and the request for permission to import streptomycin to treat Orwell went as far as Aneurin Bevan, then Minister of Health. David Astor helped with supply and payment and Orwell began his course of streptomycin on 19 or 20 February 1948. By the end of July 1948 Orwell was able to return to Jura and by December he had finished the manuscript of "Nineteen Eighty-Four". In January 1949, in a very weak condition, he set off for a sanatorium at Cranham, Gloucestershire, escorted by Richard Rees.