sentences:  The water supply was supplemented by mill streams, which were diverted into the canal after the company bought out mills at Wendover, Halton and Weston Turville.They also built Weston Turville reservoir in 1798, which was used to supply the mills in Aylesbury, whose water supply had been diverted into the canal.The reservoir was also used to replenish the canal and, as milling technology developed, this became its primary purpose.