My thanks to Louise,Cath., and Dot. for the information they have provided re. 5,Chester St.,Birkenhead, close to the River Mersey.Does the house still exist after at least 161 years?My g g g grandfather,Thomas Cox was a Master Mariner in 1841 and 1846 but there appears to be no record of him ever being a Captain or Ship's Master.Do you have any idea what other kind of Maritime career he might have been in?Ray.Jones,Ontario,Canada