Original sentence: Over the next couple of years, many went back to Ingenika Point, a low bluff overlooking the water that covered their traditional home.The Tsay Keh Dene,  formerly known as the Ingenika band, comprising some 125 families (many of whom spoke no English), were moved from their traditional village site, where they supported themselves by hunting and trapping, to what were supposed to be model reserves a couple of hundred kilometres south near the booming mill town of Mackenzie
Edited sentence: Many came back to Ingenika Point, a low bluff overlooking the water that covered their traditional home.Over the next couple of years, they drifted away.The Tsay Keh Dene,  formerly known as the Ingenika band, comprising some 125 families, were moved from their traditional village site, where they supported themselves by hunting and trapping, to what were supposed to be model reserves a couple of hundred kilometres south near the booming mill town of Mackenzie.The flooding of the Finlay and Peace river valleys was a tragedy for the aboriginal inhabitants of the reservoir valleys.The move was a disaster for the Tsay Keh Dene, many of whom spoke no English