This is a very simple Multi-cache.
You can enjoy a stroll with your dog afterwards.
A&B: The last two digits of the year of Olive's death and add 9.
C: The last digit of Olive's age and subtract 1.
D: The first digit of Olive's sister Mary's age. (When she died)
E: The first digit of Olive's sister Mary's year of death
F: Calculate the difference in years between Olive and Mary’s death and then subtract 23
Checksum = 10 + 16 = 26
You are looking for a micro at S 34 35. ABC E138 45.DEF
Happy Hunting
Mattycat, Purrfect Di and Jack the Monkey.