Mr. Handy wrote:
Liz looks around for any tracks in the snow.
At this time of year -- midsummer -- the island is covered with what might be better called slush than snow. There are areas of bare rock and patches of moss and scurvy grass that alternate with the soft, wet stuff.
Liz is able to determine that somebody left a single set of tracks, heading south. (There is hardly any other way to go, except for a bit to the east and west.) The exact shape of the prints is not evident, given the slushy, wet conditions; they're more like vaguely foot-shaped depressions. About all that can be told, judging from their size, depth, and the distance between them, is that the person who left them behind was large, heavy, and was running with long strides.