I would like to know more details on the loss of MGB 641 during the invasion of Sicily. The incident is briefly mentioned in Flag 4 by Dudley Pope. I have the report of the Italian submarine Nichelio which engaged the three MGBs (the other two were MGB 643 and MGB 646) and claimed one damaged before escaping by diving. Shortly after, MGB 641 was reportedly sunk by coastal batteries and the survivors captured but I have found nothing (so far) in the Italian archives.
Many thanks.
Platon Alexiades