Camping in the lonely timber, Sleeping on the scorching plain, Bearing heat and thirst and hunger, Sore fatigue and wind and rain-- Halting only when the telltale Mark was missing in the track; Only when he called a greeting, As he passed some settler's shack; Till the valley and its timber Vanished, where the rolling sward Of the westward-sweeping prairie Marks the trail 'cross Mingo's ford. 7 Here for hours he searched the crossing And the wheel-ruts leading on To the north, a full day's journey, But the guiding mark was gone. Not a vestige here remaining Of the sign that could be told, For old Mac had traveled swiftly