bit of info - found Isabellas death on SP:
Isabella Ritchie. widow of Alexander Ritchie, ploughman. deceased.
March 28th 1898 clunie, parish of Abernaethy. 80 years. general debility.
Father: Alexander Baldie, ploughman, decsd.
Mother; unknown
informant; neighbour.
confirms her date of birth and looks likely Alex died in Abernathy too before 1898.
Diddy