1. Three series of cases of oedema in an internment camp are described.
2. The first series of cases consisted of those diagnosed as beriberi. They were much less common than cases of oedema from other nutritional causes. Most of the beriberi cases occurred in a period when the supply of vitamin B1 was low. The other patients developed their disease while outside the camp. The clinical features are described and the diagnosis discussed.
3. The second series of cases occurred at the same time as the beriberi, but the olinical appearances were sufficiently different from beriberi to lead to the diagnosis of nutritional oedema from some unknown cause.
4. The third series occurred towards the end of internment and were probably due to hypoproteinaemia.