A plan of a bill for draining and preserving certain fen lands and low grounds lying in the South level, part of the great level of the fens commonly called Bedford level, and in the county of Cambridge, between the river Cam otherwise Grant, West, and the hardlands of Bottisham, Swaffhams, and Burwell, East ; and for impowering the governor, bailiffs, and commonalty of the company of conservators of the Great level of the fens commonly called Bedford Level, to sell certain fen lands lying within the limits aforesaid, commonly called invested lands,