An Act for making the River Douglas alias Asland navigable from the River Ribble to Wigan in the County Palatine of Lancaster....An Act for altering and varying the powers of an Act passed....for making the River Douglas...navigable; and for enabling the Proprietors of the Leeds and Liverpool Canal to purchase the said River Navigation...... ;for amending the said last mentioned Act; for incorporating and consolidating the said two navigations and for other purposes. Geo 3 Cap xlvii