were taken to Bordeaux and interned first in Garaison and then from March 1918 in Saint-Rémy-de-Provence. In July 1918, after being transferred to his home in Alsace, he was a free man again. At this time Schweitzer, born a German citizen, had his parents' former (pre-1871) French citizenship reinstated and became a French citizen. Then, working as medical assistant and assistant-pastor in Strasbourg, he advanced his project on the philosophy of civilization, which had occupied his mind since 1900. By 1920, his health recovering, he was giving organ recitals and doing other fund-raising work to repay borrowings and raise funds for returning to Gabon. In 1922, he delivered the Dale Memorial Lectures in the University of Oxford, and from these in the following year appeared Volumes I and II of his great work, The Decay and Restoration of Civilization and Civilization and Ethics. The two remaining volumes, on The World-View of Reverence for Life and a fourth on the Civilized State, were never completed. In 1924, Schweitzer returned without his wife, with an Oxford undergraduate Noel Gillespie as his assistant. Everything was heavily decayed, and building and doctoring progressed together for months. He now had salvarsan for treating syphilitic ulcers and framboesia. Additional medical staff, nurse (Miss) Kottmann and Dr. Victor Nessmann, joined him in 1924, and Dr. Mark Lauterberg in 1925; the growing hospital was manned by native orderlies. Later Dr. Trensz replaced Nessmann, and Martha Lauterberg and Hans Muggenstorm joined them. Joseph also returned. In 1925–6, new hospital buildings were constructed, and also a ward for white patients, so that the site became like a village. The onset of famine and a dysentery epidemic created fresh problems. Much of the building work was carried out with the help of local people and patients. Drug advances for sleeping sickness included Germanin and . Trensz conducted experiments showing that the non-amoebic strain of dysentery was caused by a paracholera vibrion (facultative anaerobic bacteria). With the new hospital built and the medical team established, Schweitzer returned to Europe in 1927, this time leaving a functioning hospital at work. He was there again from 1929 to 1932. Gradually his opinions and concepts became acknowledged, not only in Europe, but worldwide. There was a further period of work in 1935. In January 1937, he returned again to Lambaréné and continued working there throughout World War II. Hospital conditions The journalist James Cameron visited