Just came across your enquiry. I have good reason to think that Harriet Leaf of Howden married my Great Grandfather, Robert Monkman, maybe in 1888, in Bradford, Yorkshire, England. My cousin and I are still researching this name.It was his 3rd marriage. He definitely was married to a Harriet from Howden. We are quite certain she is the one. The 1861 census reveals that she was age 16 from Howden. Her parents were Jane 54 and William 52 with sibling Edward 21 and William 14. There were probably others away from home judging from parents age. Harriet worked as a Domestic in Bradford in 1871. Is this your family.