This is probably a red herring but might be worth looking into given Br1gau's findings about the potential spellings of 'Bresslin' ...
SP Wills and Testaments
SC36/51/44
Fletcher, Michael, date of will, 11/12/1862
Cotton Waste Merchant in Glasgow, spouse of Roseann Breisland Fletcher
SC36/48/61
Fletcher, Roseann, date of will, 01/01/1869
Mrs, alias Briesland, residing at Apsley Place, Glasgow, widow of Michael Fletcher, Cotton Waste Merchant in Glasgow
SP CPR Marriages
13/04/1836
Fletcher, Michael, Buyslan Roseanne, Glasgow St Andrews