Complex sentence: During the night a party of Indians arrived at the Sauk village from Prairie du Chien, coming down the Rock river bringing the Sauks six kegs of powder and telling them that the fort at Prairie du Chien had been captured by the British.
Split into simpler sentences: During the night a party of Indians arrived at the Sauk village from Prairie du Chien, coming down the Rock river. They brought the Sauks six kegs of powder and told them that the fort at Prairie du Chien had been captured by the British.