I am not much help but have one ancestor who married a Hearfield in Hull, Yorkshire. Her name was Mary Ann Blythe. All I have on her was that she was widowed prior to 1874, she was a dressmaker. She was born in 1826. Was not married on the 1851 Census of Hull. In the same census, I can find only one Hearfeild. Samuel aged 30 born in Burley. If you have come any further with your research, let me know.