" What became of Albert's mother is not clear but she apparently died sometime prior to 1896. "
True, however there are lines of research which appear to indicate Fanny Coleman nee Leverton may have left Joseph Coleman and became connected with one Walter Groves 3 May 1855 - Jun 1948 and subsequently had 10 children between 1885 and 1908.
Nobody however has been able to locate any record of a marriage. Fanny's date of death is also yet to be found.