30 Jun 21 - The Italian Alps - Alistair Graham Kerr 

07 July 21 - Cold war preparations in the Netherlands - Raphael Smid 

14 July - Dutch forts around the Atlantic: 17th Century Fortifications of the Dutch West India Company in Africa and the Americas - Oscar Hefting 

28 July - The Martellos of Kingston, Ontario, Canada - Joseph Last 

The Fortress Study Group CIO is a registered charity, No 1194017.
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