Observatory 2010
Sydney Observatory Museum of Applied Arts & Science
A Short History of Sydney Observatory Museum of Applied Arts & Science
Sydney Observatory (detailed) NSW Office of Environment & Heritage
Sydney Observatory NSW Office of Environment & Heritage
Sydney Observatory Heritage Council of NSW
Sydney Observatory building Dictionary of Sydney
Sydney Observatory Wikipedia.org
The Observatory www.SydneyArchitecture.com
History of Observatory Park www.CityOfSydney.nsw.gov.au
Observatory Hill Park www.CityOfSydney.nsw.gov.au
Site Investigations - Observatory Hill www.TeachingHeritage.nsw.edu.au
Observatory Park, Sydney Wikipedia.org
Millers Point Dictionary of Sydney
NSW Office of Environment & Heritage
Dictionary of Sydney
State Library of NSW