The N.U.W.S.S. eventually had five units in Serbia. One of the most magnificent pieces of work they did was the successful grappling, under Dr. Inglis's guidance, with the typhus epidemic in 1915, which threatened the very existence of the Serbian Army. It may be said that twice Dr. Inglis saved the Serbian nation from despair—once when she stamped out the typhus epidemic, and once when the country was overrun by the then victorious Germans and Austrians. This compelled the withdrawal of most of our units. The papers told of their wonderful tramp of 300 miles across ice-bound mountains. Dr. Elsie Inglis and Dr. Alice Hutchinson, with their respective staffs, did not leave Serbia when the other units left. They stayed on and continued their work until they were taken prisoners by the Austrians. They were prisoners for three months. Dr. Alice Hutchinson told how she and her unit kept Christmas, 1915: "In the evening we sang carols and drank toasts. We even ventured to sing 'God save the King' under our breath.... It cheered us wonderfully. We had our British flag with us, too. I wound it round my body under my clothes when we evacuated our hospital, so that it should not be trampled on and insulted." (_The Common Cause_, February 18th, 1916). She refused to give up her hospital equipment without a receipt, and on being ordered to send her unit to a cholera hospital, she refused, except on condition that her nurses were first inoculated, and also paid for their work, and their proper rank accorded to the doctors. "At this," she said, "there was a terrible scene. I was sworn at and cursed, and told I was a coward; but I would not give in." She was willing to work herself for cholera patients, but would not allow her nurses to do so without inoculation. Dr. Elsie Inglis also showed the same fine spirit. They both said that the Germans, officers and men alike, behaved like brutes, the latter using disgusting and insulting language. The Austrians, officers and men, were kind and polite. But the hardships of the imprisonment were shortage of food and gross overcrowding. Our doctors were enthusiastic in all they said of the courage and devotion of the Serbians. They reached home safe and sound, and made an appeal for additional subscriptions to continue their splendid work. The scientific work done by the women doctors at Royaumont received an unsolicited testimonial in 1916 from a leading French man of science, Dr. Weinberg, who held the office of Chef de Laboratoire at the Pasteur Institute, Paris.