I know you are searching for her maiden name and it can be infuriating when people find information off at tangents, but have you seen the newspaper article about the conviction of Christina Montrose, aged 58, in 1913?
It makes interesting reading. Especially the last bit where:
"The Chief-Constable said prisoner's record of convictions went back as far as 1877, and she had served seven years' penal servitude. Her last conviction was in October, 1911, when she was sentenced to 18 months' hard labour for stealing boots, clothing, etc. There was no doubt she was a habitual criminal. Accused was sentenced to six months' hard labour."
("SERVANT'S THEFTS - Bad Case at Exeter", Exeter and Plymouth Gazette 16 October 1913, p. 3, bottom of Column 2)
That sentence must have been tough at age 58. And notice that her first conviction was the year that Alice was born. It must have been a very tough year for her.
Anyway, given she was not exactly on the straight and narrow, I wouldn't be a bit surprised if some of the information in her various records could be fabricated.
Sorry for going at a tangent, but I find such background information very useful when trying to understand motivations and behaviours of our ancestors - especially the ones with brick walls.