As the 2nd edition of my book about Operation Longshanks - SOE coup in Marmagoa harbour in 1943 - goes to the publisher I do regret because no access was possible to any document from Goa's Archives [may I ask for help?], despite the case was judged there, and from the Portuguese Ministry of the Navy, and it was ate least two official inquiries conducted by harbour authorities about the nature and cause of the incidents.
The book now quotes a decision from the Portuguese Supreme Court after an appeal made by the crew after their arrest and long proceedings that I could finally trace. Arrested in Aguada some wrote to the family. Here is one of the letters, written by Eng. Gerhard Brandt, from the Ehrenfels ship. See mucha more here with an English translation.
Some mysteries still remain, mainly the fate of Commander Röffer, the Captain of the Ehrenfel and Robert Koch and his wife, Grete, living in Altinho, allegedly shot in Castle Rock, after being kidnapped.