Hi Crow,
I merely found him briefly while reading the wealth and depth of work produced by Robert Bousquet ;
Les esclaves et leurs maitres a Bourbon , au temps de la compagnie des Indes 1665 - 1767
Anthony de Silvestro became known via book written by Clement Downing in 1737
Compendius history of Indian Wars.
Downing arrived in India in company with the newly arriving Governor of Bombay Charles Boone in 1715 , some believe his book to be loaded with a heavy dose of fiction , however if it is dissected and placed in sequence , a lot of truth does come from it. Especially if it can be cross referenced via other sources / documents, admittedly some dates and names are out of wack to an extent.
This treasure appears to be in a no go area and really advisable in not taking a risk on it.
p124-125 of Downings book will give the origins of where this story started to be told.
Downing met Silvestro , he was part of a group 2 Dutch and 3 Portuguese , Silvestro being Portuguese spoke good English and had been brought up by one Cpt Westerby of Poplar , Silvestro talked of having been amongst pirates and he had been on one of the sloops coming out of Virginia , when Blackbeard was caught.
So how did he get to the Indian Ocean? 1718 A few pirates were starting to venture across the Atlantic for West Africa ...Condent , Ed England , Cocklin , La Buse , John Taylor (Richard to his crew) Moody , so who knows? it could be whittled down to Edward England and his time as quarter master to pirate Charles Vane and his connections with Blackbeard as the most likely route , but then again , Condent was/is a tough one to track his whereabouts at the time. Taylor was with England as well.
As for Silvestro , i will try find the piece but it was a very brief piece amongst many.
Banana`s