The critical point is whether she died before 1855, when statutory civil registration started in Scotland.
There are various web sites with headstone inscriptions including
http://www.memento-mori.co.uk/https://www.gravestonephotos.com/https://www.findagrave.com/cemetery/2463387/drymen-parish-churchyardhttps://billiongraves.com/cemetery/Drymen-Church-of-Scotland/173162Do you know the names of her children and where they were born?
There is a family in Croftamie, parish of Kilmaronock in 1841 comprising John Edmond, 45; William, 15; John, 13; James, 10; Robert, 5; Margaret, 20; Agnes, 18; Hellen, 16; Elisabeth,8.
In 1851, at the same address, are John, 60, born Killearn; Margaret, 31; William, 28; John, 24; James, 21; Elizabeth, 18; Robert, 15, all born Kilmaronock.
So it would appear that Helen must have died before the 1841 census. This makes it difficult to find her with certainty, having no idea how old she was or where she was born.
John Edmond, aged 80, died in Kilmaronock in 1870.
If you have not already done so, go to
www.scotlandspeople.gov.uk where you will be able to see originals of almost all surviving records of births, baptisms before 1855, proclamations of banns before 1855, marriages after 1855, deaths after 1855 and census 1841-1911.
