Complex sentence: Every Indian in the valley shuddered and all eyes looked toward the Indian brave's high mound upon which the strong Princess Nit-A-Nee stood with arms outstretched to touch the sources of the lightning bolts in the sky.
Split into simpler sentences: Every Indian in the valley shuddered, and all eyes looked toward the Indian brave's high mound. There the strong Princess Nit-A-Nee stood, with arms outstretched, to touch the sources of the lightning bolts in the sky.