Nominations: Monday, 20 August 1866, Polling: Monday, 27 August 1866
Candidate
Votes
Votes %
Mackellar, Alexander
164
42.82
Robertson, John (Elected)
219
57.18
Formal Votes
383
Informal Votes
7
1.79
Total Votes / Turnout
390
18.34
Cause Category: Resignation - Other
Notes: Sitting MP JC Laycock resigned. (Reason not known)
Source: Brief mention of nominations, SMH 21 August 1866, p.5 col.1, results from Clarence and Richmond Examiner, 4 September 1866, p.3 col.1, reported as 'whole of the returns'.