IN my previous accounts of the John Murray Expedition (NATURE, 133, 86, 669, Jan. 20 and May 5, 1934), I dealt with the work done up to the time of our arrival in Colombo on Feb ruary 22, and in the present paper I give an account of the concluding part of our voyage. While in Colombo, we were joined by Major E. A. Glennie, R.E., of the Survey of India, and his staff, who had been detailed to accompany us through the Maldive Archipelago and carry out observations on the variation of gravity by means of pendulum experiments. Leaving Colombo on March 17, we steamed south-west to a point just north of the Chagos Archipelago, and then turned northward to investigate the depth and hydrographic con ditions existing in the channel be tween the Chagos and Maldive groups of islands. On the completion of this work we visited Addu atoll, and Major Glennie and his apparatus were landed on Putali Island at the north-east corner of the atoll. After leaving Addu atoll we steamed northwards to South Male atoll, landing Major Glennie on the way at Kolumadulu and Mulaku atolls.