5) What is Scott’s main concern at the very end?

Scott’s main concern is he maybe already knows that this expedition can be the very last in their lives.(“and a shortage of fuel in our depots for which I cannot account, and finally, but for the storm which has fallen on us within 11 miles of the depot at which we hoped to secure our final supplies. Surely misfortune could scarcely have exceeded this last blow.”) But evens as he knows this maybe will be the end, he still fights on and writes heartening. (“I do not think human beings ever came through such a month as we have come through”)