This is part of a list of persons holding title under the Mining Act and this person, Warden Martin seems to be the author of a report. The column he is in is headed 'by whom'.
I found what must be him on Trove at Glen Innes as G Martin, Gold Warden.
Should the Warden bit be a prefix or should I ignore it?
The only other person in this column is 'The examiner of Coal Fields'.