• National Trust of Australia (NSW)
• Royal Australian Historical Society

• Lithgow & District Family History Society
• Blue Mountains Family History Society

Other Historical Societies:

• Springwood Historical Society
• Hawkesbury & District Historical Society
• Nepean District Historical Society


• Blue Mountains Cultural Heritage
• Mid Mountains Historical Society
• Mt Wilson and Mt Irvine Historical Society
• Kurrajong-Comleroy Historical Society
• Springwood Historians

Newspapers and Images

• Trove - digitised Australian newspapers
• Picture Australia
• Blue Mountains Library - image search
• Flickr
  

Maps

• Parish Map Preservation Project
• Blue Mountains Library - image search
• Blue Mountains Address or Parcel Search
  
  

• The Australian Dictionary of Biography
• Registry of Births, Deaths and Marriages
• Blue Mountains Cemetery Register

Libraries etc.

• State Library of NSW
• Trove - National Library
• Blue Mountains City Library catalogue
• Dictionary of Sydney
• State Records Authority of NSW
• Natinal Archives of Australia