Aye Right, not sure if you have the right death entry for Helen. I think this looks like her with her two sons in the 1881 Census:
Alex Hutchison 42, Bathkeeper (Unemployed), b. Glasgow
Eliza Hutchison 10, niece, b. Glasgow
Helen Hutchison 72, (down as wife but surely mother!), b. Maybole
John Hutchison 37, Labourer In Locomotive Works, b. Stanley, Perthshire
Address: 10 Gilmour St, Glasgow Hutchesontown
...So unless something went horribly wrong between April and June that year, Helen's DC is still likely to be found?
Regards.
Monica