In "The Interlopers," what is Ulrich doing in the forest?

In the Saki short story "The Interlopers," Ulrich is in the forest looking for his sworn enemy.

“…eastern spurs of the Karpathians, a man stood one winter night watching and listening, as though he waited for some beast of the woods to come within the range of his vision, and, later, of his rifle. But the game for whose presence he kept so keen an outlook was none that figured in the sportsman's calendar as lawful and proper for the chase; Ulrich von Gradwitz patrolled the dark forest in quest of a human enemy, Georg Znaeym.”

Georg and Ulrich have been enemies since their birth because their fathers were enemies as were their fathers.  This animosity occurred over a land dispute and has been passed down over the generations.