Complex sentence: The circuit included an area of about 200 miles, and stretched from the Iowa River on the south to the Wapsipinicon River on the north and went inland to where ever there was a White settlement.
Split into simpler sentences: The circuit included an area of about 200 miles. It stretched from the Iowa River on the south to the Wapsipinicon River on the north and went inland to where ever there was a White settlement.