National Geographic : 1939 Jul
THE NATIONAL GEOGRAPHIC MAGAZINE LIKE ISOLATED CLIFFS, GIANT ANTHILLS RISE ABRUPTLY ON A FIELD NEAR DARWIN Built by "white ants" of northern Australia, the mounds are more than ten feet high and exceed six feet in width. They rise in the shape of a flattened wedge (opposite page). These architects really are not ants at all, but termites related to cockroaches. LINES ASHORE KEEP STRONG WINDS FROM BLOWING "IGDRASIL" INTO DEEP WATER So steeply does the bottom drop off in Charles Sound, New Zealand, that an anchor will not hold against offshore winds. Only by fastening ropes to trees and rocks could the Strouts obtain a quiet overnight anchorage (page 51).