Robin is 'searching for firewood.' Of course, gathering the firewood took only ten minutes-- most of the trees in the area are scraggly and there are dead branches everywhere. He snaps them off with ease. Most of his time is dedicated to doing a perimeter sweep and making mental notes of potential dangers as well as potential resources. (You'd better believe he knows which plants are edible.)

After about an hour, he returns to camp, his arms full of firewood.

"You know where I went," Robin replies teasingly. He knows they meant Jack, of course.