I really should have obtained the marriage certificate of my great grandparents William Henry ASHFORTH 1873-1926 and Florence ASHFORTH (née Florence FLOWERS 1876-1973) before embarking on a search for my great great grandfather William Henry ASHFORTH 1851-1899.
Other than information found in the England and Wales Census 1881, searches for a date of birth for both my great grandfather William Henry ASHFORTH 1873-1926 and great great grandfather William Henry ASHFORTH 1851-1899 have not produced any conclusive results.
A search for Rosa ASHFORTH 1874-Deceased one of my great great grandfather William Henry ASHFORTH 1851-1899's daughters yields a single record, a birth during June 1874. Variations of Rosa i.e. Rosey, Rosie, Rosanna and Rosalind produce results outside my expected dates.
Therefore I have gone ahead and ordered from Sheffield Register Office the following certificates:
William Henry ASHFORTH 1873-1926 and Florence ASHFORTH (née Florence FLOWERS 1876-1973) - Marriage Certificate
Rosa ASHFORTH 1874-Deceased - Birth Certificate
Hopefully the birth certificate for Rosa ASHFORTH 1874-Deceased will reveal her mother's maiden name.