Some facts re Mabel (May) Andrews
Marriage:
7969/1898 registered at Lambton, NSW
MCGUINESS JOHN
ANDREWS MABEL
An online tree shows 4 children to this couple but I can't find birth registrations for them, nor death registrations although the on-line tree has pictures of graves at Wallsend for three of them who died very young.
Coroner's Inquest:
Mabel Theresa Mcguiness, age 34
Birth abt 1877, New South Wales
Death Place Killingworth
Inquest: 11 Oct. 1911 at Killingworth
Cause of death: Heart failure
I am not seeing a death record on the NSW BMD site which is not unusual when there has been an inquest.
Find-a-Grave has some photos of the older graves plus a photo of a more modern plaque which confirms that Mabel (May) McGuinness d 1911 is the daughter of "a significant woman in Australian history, Louisa Collins, formerly Andrews nee Hall, died 8 January 1889"
https://www.findagrave.com/memorial/49764919/edward-mcguinessJudith