Finally, something more conclusive below... namely, the grave record for Jane
Doherty McDaid who died on 6 April 1915, she was buried on 8 April in Derry City Cemetery, the stated father's name matches that in the 1881 marriage I posted at reply #3, there's also mention of 29 Lecky Road, so that fits:
https://www.findagrave.com/memorial/207723843/jane-mcdaidThe death registration below described her as the 49 year old widow of a butcher - but the all important bit is the name, relationship and residence of the informant:
'Joseph McDaid Son Present at death Strabane':
https://civilrecords.irishgenealogy.ie/churchrecords/images/deaths_returns/deaths_1915/05273/4463855.pdfThe Derry Journal death notice on 7 April 1915 described her as
'Jane, the beloved wife of the late Bernard McDaid, butcher'.
BTW, the same newspaper also mentioned Bernard McDaid who predeceased Jane in January 1912, first a death notice on 22 January saying
'January 21, at his residence, 29, Lecky Road, Derry, Bernard McDaid, butcher - R.I.P. His remains will be removed for interment in the City Cemetery to-morrow (Tuesday), the 23rd instant, at half-past two o'clock p.m.', then on 24 January a brief account of the funeral, in which the deceased was described as the
'son of the late Mr. Arte McDaid of the Bogside, a stalwart of the old time Nationalism in Derry, and he himself in his own day, did his part' - again, the father's name matches that in the 1881 marriage I posted at reply #3.