Daniel Anthony Andersen was born in India in 1906 and educated in England. He qualified with the Conjoint Diploma from University College Hospital in 1933, taking the MB BS later that year. In 1939 he took the FRCS and was appointed by the Salvation Army as chief medical officer to the Evangeline Booth Hospital, Ahmednagar, India, which had been closed for four years. Under his leadership, and with the help of his medically qualified wife, it was quickly re-established and during the next ten years was the only hospital where surgery was practised in an area of over one million people. A nurses' training scheme and work in tuberculosis were also begun. In 1947 he proceeded MD, and took the DTM & H, when he was awarded the Warrington Yorke medal in tropical hygiene. While his work at Ahmednagar continued until 1960, he developed a particular interest in urolithiasis. He was appointed research associate to Professor Carl Semb in the University of Oslo in 1962; honorary research Fellow, Institute of Urology, London, in 1963; honorary research associate in the department of chemistry (crystallography), University College, London, the same year; in 1970 he was elected an honorary research Fellow of University College. He was a WHO consultant for the South-East Asia regional symposium on vesical calculus at Bangkok in 1972. In 1962 he had been appointed to the Salvation Army International Headquarters as medical adviser, later becoming missionary medical secretary. Besides many papers in medicine he wrote widely about medical ethics. Dan Andersen was a quiet, gentle man of immense courage. A series of myocardial infarctions in 1967 did not deter him from his many activities. He was maintained by his deep Christian faith and sense of mission. He died on 4 December 1967 aged sixty-seven.