Related and useful links:

St. Helena

• St. Helena Government
• Friends of St. Helena
• General information about St. Helena

Ascension

• Philatelic Bureau Ascension Island
• Ascension Newspaper The Islander
• History of the Atlantic Cable & Undersea Communications

Tristan da Cunha

• The Tristan da Cunha Government and Tristan da Cunha Association
  

Friends societies

• Falkland Islands Philatelic Study Group (FIPSG)
• Polar Postal History Society of Great Britain
  
• American Society of Polar Philatelists
• Pitcairn Islands Study Group (PISG)
• West Africa Study Circle (WASC)
• BWISC – British West Indies Study Circle
• Mauritius Philatelic Society