The more delicate instruments of the physicists, instruments especially designed for this expedition and its study of the magnetic pole, detected a secondary effect, a secondary, less powerful magnetic influence about 80 miles southwest of here.
"The Secondary Magnetic Expedition went out to investigate it. There is no need for details. We found it, but it was not the huge meteorite or magnetic mountain Norris had expected to find. Iron ore is magnetic, of course; iron more so - and certain special steels even more magnetic. From the surface indications, the secondary pole we found was small, so small that the magnetic effect it had was preposterous. No magnetic material conceivable could have that effect. Soundings throught the ice indicated it was within one hundred feet of the glacier surface.

Chapter 1