Douglas Corporation, Northern Outfall sewer 2 hand coloured plans of 'Isle of Man, Douglas, Northern Outfall Sewer, Proposed Deviation' dated 9 Sep 1922. 1 hand coloured plan of the 'Borough of Douglas Proposed Northern Outfall'. 1 hand coloured plan of the 'Borough of Douglas Proposed Northern Outfall Sewer, Section' dated 20 Feb 1925. 1 hand coloured plan of the 'Borough of Douglas Proposed Northern Outfall' dated 20 Feb 1925. 9 Sep 1922-20 Feb 1925