The plan of Penarth Dock and the meandering route of the River Ely, etc. from the Glamorgan Archives, Cardiff which appears to indicate the pontoon excavated from the dam which previously covered all but the last 20 feet of the pontoon. The Archive does not provide any further information regarding the purpose of the plan. There is no title block and it appears to have been ripped apart, hence, there is no indication of its date of origin or the initiator of the plan.
[599] Archive ref : DX683/7/7 [20171011 ]