Pretending to be a Pecheneg, he went about their camp, as if searching for a lost horse. When he attempted to swim across the Dnieper, the Pechenegs discovered his subterfuge and started shooting at him, but to no avail.
Pretending to be a Pecheneg, he went about their encampment, acting like he was looking for a lost horse.  When he tried to swim across the Dnieper River, the Pechenegs caught on to his ruse and started shooting at him, but it didn't work.