Wall, J (1970). "The Quest for the Liver Bird"(PDF). Transactions of the Historic Society of Lancashire and Cheshire. 121. Liverpool. Archived from the original(PDF) on 22 December 2016.
Wall, J (1970). "The Quest for the Liver Bird"(PDF). Transactions of the Historic Society of Lancashire and Cheshire. 121. Liverpool. Archived from the original(PDF) on 22 December 2016.