Complex sentence: After getting lost during his descent, he became weak and exhausted, and by chance alone, instead of arriving in Askole, where his porters awaited, he came across Korphe, a small village built on a shelf jutting out from a canyon.
Split into simpler sentences: After getting lost during his descent, alone, he became weak and exhausted. Instead of arriving in Askole, where his porters awaited, he came across Korphe, a small village built on a shelf jutting out from a canyon.