I am trying to trace my family tree. My grandfather Thomas Nathan Sefton immigrated to Canada from England with his brother Richard Edward (Ted), who later went back to England to marry. Their parents were William Sefton and Catherine Smithers and William's parents were James Sefton and Sarah "?". Can anyone help me fill in the gaps? I gather that they were from Preston, Lancashire but I'm not sure on that. Thanks for any help.