to make walking possible
...Thoreau's Journal: 13-Feb-1859
Winter comes to make walking possible where there was no walking in summer. Not till winter do we take possession of the whole of our territory. I have three great highways raying out from one center, which is near my door. I may walk down the main river or up either of its two branches. Could any avenues be contrived more convenient? With this river I am not compelled to walk in the tracks of horses.