Hiyas,
District Constables of SA(probably too early for your guy but might be a lead)

Surname: PETTMAN
Given name(s): Theodore
District: Hall
Source(s): GG 1892 Vol 2 p 582

Surname: PETTMAN
Given name(s): W H
District: Hall
Source(s): GG 1889 Vol 2 p 854

Surname: PETTMAN
Given name(s): William
District: West Torrens
Source(s): PG 1870 p 130, GG 1870 p 1036

wonder?
Surname: PITMAN
Given name(s): Edward
District: Marion
Source(s): GG 1894 Vol 2 p 841

Surname: PITMAN
Given name(s): Ernest James
District: Highercombe
Source(s): GG 1914 Vol 2 p 525

Surname: PITMAN
Given name(s): G
District: Highercombe
Source(s): GG 1881 Vol 2 p 420

Surname: PITMAN
Given name(s): Joseph
District: Tea Tree Gully
Source(s): GG 1888 Vol 2 p 441

Surname: PITMAN
Given name(s): S
District: Highercombe
Source(s): GG 1882 Vol 2 p 3536

Surname: PITMAN
Given name(s): Samuel
District: Highercombe
Source(s): GG 1871 p 1298

Surname: PITMAN
Given name(s): Walter
District: Highercombe
Source(s): GG 1896 Vol 2 p 634

Kellie