This collection of caches has nothing to do with the Church Micro series in the UK. Given that the Australian 2016 census indicates that No Religion and Jedi Knight are the fastest increasing classifications of the optional religion question "What is the person's religion?" it is not surprising that there is surfeit of empty churches that have been repurposed.
Semaphore Baptist Church is a large two-storied structure of solid stone opened in 1883 as a church, with schoolrooms beneath. The complex expanded over the decades and in 1902, the fine organ was installed. The last church service was in the summer of 2000.
No longer a church. There are at least two businesses in this building, for those interested in politics or dental work.
To find the cache, complete the following coordinates with data from the foundation stone:
"Kapunda Marble, laid by Furner, Esq., M.P., AB Nov, CDDA."
E = A + C
F = B - C - A
G = D - B - C
H = B - A
Checksum:
A + B + C + D + E + F + G + H = 30
Cache is located at:
S 34° 50.EDF' E 138° 29.GAH'