Their inspection of the Southern Cross completed, the delighted boys accompanied Captain Hazzard back to the main cabin, where he unfolded before them a huge chart of the polar regions.
The chart was traced over in many places with tiny red lines which made zig-zags and curves over the blankness of the region south of the eightieth parallel.
"These lines mark the points reached by different explorers," explained the captain. "See, here is Scott's furthest south, and here the most recent advance into south polar regions, that of Sir Ernest Shackleton. In my opinion Shackleton might have reached his goal if he had used a motor sledge, capable of carrying heavy weights, and not placed his sole dependence on ponies."
The boys nodded; Frank had read the explorer's narrative and realized that what Captain Hazzard said was in all probability correct.

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