Have just amended first post and deleted Death date and Birth quoted for Mary Malone as found it was not her.
1939 Register in Huyton with Roby and 1930 Marriage is all we have to go with.
The register gives a date of birth as 30th January 1902.
You mentioned a published tree earlier re Annie. I haven’t found that yet, but there is a Higgins/Malone tree with a Malone family photo but I think the information is wrong re Mary.
That tree has Mary b 1904, Haydock, with parents John Malone and Catherine Sweeney and married to William Thomas Higgins.
However, there is a more likely marriage to Jack Southern in 1936.
From your statement above, it looks as though you are disregarding family trees now, which might be a good thing unless there is better evidence.
