There are three books about Sunderland Police; "History of the Sunderland Borough Police", by J.Conlin. "Back on the Borough Beat", by J. Yearnshire. "Sentinels of the Wear", history of Sunderland's River Police, by N.W. Mearns. I tried to contact Harry Wynne some time ago without success, I got my great great grandfather's details from the Tyne and Wear Archives. Harry Wynne is the Historical Information Officer and Editor of the North East Police History Society http://www.communigate.co.uk/ne/nepolicehistory/they have a message board which does not appear to be very active, the last message was in July 2008. You can contact them see http://www.communigate.co.uk/ne/nepolicehistory/mailform.phtml Stan Mapstone.