Then in an instant, a glimpse of a something lodged in the branches of a drifting tree spurred him on to fresh endeavors, cleared his brain of fatigue clouds. Hal was miles from headquarters, skimming above a section which had been cleared of refugees earlier in the day. And now into his line of vision there came drifting a tree, now and again submerging to the pull of the currents, and bearing caught in its branches a tiny figure.