A complete listing of the Surveyor General's Crown Plans from the Select List of Maps and Plans (and Supplement), 1792-1886. It contains the earliest surveys of NSW (towns and villages, squatting districts, counties and parishes, roads, rivers, mountain ranges, and explorers' expeditions). 

The index records surveyor's name, date and locality covered and gives book number, item number and reel number (if available on microfilm).

These are letters received from surveyors, mostly relating to matters such as the survey description of farms, reserves, churches, schools, rivers and mountain ranges, or forwarding tracings and plans of these after survey.