Further ruins slightly to the north at Cape Bridgman have been found, likely as a short-term expedition from the Frigg Fjord settlement.

These inhabitants were people dependent on hunting muskoxen for survival and they lived a great part of the year in complete darkness.

After landing successfully with their plane in the unfrozen surface of the head of the fjord, they made a south–north crossing of the Roosevelt Range through the Polkorridoren pass to Sands Fjord.

[4] Unusually for the latitude, the head area of Frigg Fjord is not frozen in the summer.

When Lauge Koch saw a sector of this area from the air in 1938, he named it Drivhuset, meaning greenhouse, because he thought it was covered with vegetation, but it turned out to be an extensive, barren delta terrain.