An account of a voyage to Etah, North West Greenland, on the Bowdoin under the auspices of the Carnegie Institution and the National Geographic Society. As well as scientific work on terrestrial magnetism and atmospheric electricity, the expedition erected a memorial at Cape Sabine to Greely's expedition. The expedition wintered in 1923-24 on Inglefield Gulf. Macmillan had previously accompanied Peary on his 1908-9 North Pole expedition.