Footprints in the snow have been unfailing provokers of sentiment ever since snow was first a white wonder in this drab-coloured world of ours. In a poetry-book presented to one of us by an aunt, there was a poem by one Wordsworth, in which they stood out strongly—with a picture all to themselves, too—but we didn't think very highly either of the poem or the sentiment. Footprints in the sand, now, were quite another matter, and we grasped Crusoe's attitude of mind much more easily than Wordswort