Birth record from the General Register Office

DAVIS, CHARLES JESSE. MOTHERS MAIDEN SURNAME: CLARKE
GRO Reference: 1872 M Quarter in GLOUCESTER Volume 06A Page 292.

What year did the family arrive in South Australia?
So far, I have only found one family arriving in South Australia with only two children Lucy and Charles in 1877. Father was a bricklayer.

Charles Davis died in 1909 and in a newspaper, article published on the 28th of October 1909 it states that he arrived in Australia around 31 years ago (1877/1878).