THE loss of Lieut. Eielson removes one of the most experienced Arctic pilots and a pioneer in polar aviation. On Nov. 9 last year, he set out from Teller in Alaska on a second aeroplane journey to the ice-bound vessel Nanuk, off Cape North, Siberia. On his failure to arrive, search parties were sent out, and during the month of February discovered the bodies of Lieut. Eielson and his companion, Mr. E. Borland, near the wrecked machine about 90 miles south-east of Cape North.