Harold P. Gilmour

Gilmour made a daily official journal of all events, from the day they set sail on the USMS North Star on November 21, 1939, from the Navy Yard Pier 41 in Philadelphia, Pennsylvania, to the day they returned in 1941.

The vessel had originally set sail from Boston on November 15, 1939, after months of preparation for the voyage to Antarctica.

One was a single-engine Beechcraft to be used together with the Snow Cruiser, and the other was a twin-engine Condor to be used at the West Base for geological exploratory flights.

The expedition mapped and geologically surveyed most of the southern portion of the Edsel Ford Range, and also investigated the different natural resources of the area.

In the nearly three-month expedition, they had to be supported by airplanes that deposited supplies at 100-mile intervals along their charted route.