I was pleased when the U.S. Naval Observatory invited me to go to Niuafoou in 1930 as the geologist on an expedition going to study the total eclipse of the sun. The expedition, under Captain C. H. C. Keppler, used the Naval Station at Samoa as a base. Mrs. Jaggar accompanied me as far as Pago Pago and made trips to Western Samoa, Fiji, and the Tonga Islands. With other wives of expedition members, she was allowed to make a short visit to Tin Can Island at the time of the eclipse in October. Spending some time in Samoa, she listened to the Congressional hearings under Senator Hiram Bingham, which were to investigate civil versus naval government. We were delighted to find our old friend Captain Lincoln, of Tokyo earthquake relief, in command of the Navy at Samoa, and I also renewed acquaintance with the pilot of my companion plane in the Molokai forced landing of 1924, Lieutenant Bill Sinton, and his family, whom we were to meet again in Honolulu. Prominent on Captain Keppler’s staff was Lieutenant-Commander Kellers, physician and naturalist, whose enterprise on the Niuafoou expedition, like mine, dealt with sciences other than astronomy. From the sea, Niuafoou looks like a hat in shape. It is about five miles in diameter with eleven villages, mostly along the eastern shores, and at that time had a population of about a thousand people. In the center is a circular lake, bordered by cliffs, and much like Crater Lake in Oregon. Standing about seventy feet above sea level and 250 feet deep, it has slightly brackish water. The naval camp was established at Angaha on the north side of the island, and here a new village housed the refugees from Futu to the northwest, destroyed in 1929 by an aa lava flow. This flow came from erupting cracks trending north and south, along the west side of the ring ridge around the crater lake. These lava flows had been liquid pahoehoe at the source; had poured into the sea in many places; and had made striking tree molds around coconut palms, which were left as stone trees when the wood burned and the liquid lava lowered. The western source crack extends to the south end of the island and has accounted for most of the earlier eruptions known to history. Futu had been the only western settlement left. Angaha came nearest to being a harbor, but was really on an open roadstead, with a rocky boat landing and copra chute below the village which stood on a cliff above.