John W Preston was born either 1844 or 1850 in Ripon N Yorks. In 1881 he was living in West Ham London and was an out-of-work sailor. His wife Mary Ann ne Stower came from Weymouth Dorset and their eldest child was born there. Her father was also a sailor. Who were John's parents and which birth year is correct? When did he arrive in Weymouth? What caused the family to move to London (there by 1878)? Any help appreciated.