I thought I ought to briefly post on something which I worked out recently. In BN3 (the third Bernardin Nageon de l’Estang document, though almost certainly not written by him), the writer mentions both a “Commandant Hamon” (who was currently supporting him in his ill health) and a former “Capitaine” (from whom he had got the treasure letters BN1 and BN2).
Here’s all we know about this dying captain, via Robert Charroux’s version (on my interlinear page):
Avec eux nous avons fait de jolies prises, mais à notre dernier combat sur les côtes d'Indoustan, avec une grosse frégate anglaise, le capitaine a été blessé et à son lit de mort m’a confié ses secrets et des papiers pour retrouver des trésors considérables enfouis dans la mer des Indes et en me demandant de m'en servir pour armer des corsaires contre l’Anglais; il s'est assuré auparavant si j’étais franc-maçon.
We made many splendid captures from them, but at our last battle with a large British frigate on the shores of Hindustan, the captain was wounded and on his deathbed confided to me his secrets and his papers to retrieve considerable treasure buried in the Indian Ocean; and, having first made sure that I was a Freemason, asked me to use it to arm privateers against the English.
So… what’s the difference between a Capitaine and a Commandant?
I may still have this wrong (it’s a pretty subtle thing), but I now think that a “commandant” is someone who is “in command” of a ship of any ship, whereas in the French Navy a “capitaine” was either:
- a “capitaine du vaisseau” (captain of a vessel), i.e. the formal (typically very senior) captain of a large “ship of the line”; or
- a “capitaine du frégate” (captain of a frigate), i.e. the formal (typically fairly senior) captain of a frigate or large ship (possibly a corvette)
So, capitaine is about rank, while commandant denoted someone who had been given command of a ship. For example, in a corsairing context, if you were a lower rank officer who had been given command of a prize ship, you would be its commandant but not its captain.
For the 1800-1810 period, the French Navy only ever sent a tiny number of ships of the line in the Indian Ocean. In fact, the only one I’ve found so far was the 74-gun Marengo which was the French flagship in the Indian Ocean from 1803-1806, taking part in the Battle of Pulo Aura in 1804, etc. For commandant, the Marengo had both Contre-Admiral Charles-Alexandre Léon Durand Linois and Capitaine Joseph-Marie Vrignaud, neither of whom seem to have suffered any injury in the Indian Ocean. Which all leads to my general doubt that the BN3 writer was referring to a capitaine du vaisseau in charge of a ship of the line.
Putting all this together, I believe that what we see in BN3 appears to tell us that its writer was referring to a ranked captain (rather than a capitaine du vaisseau), and very probably on a French corsair frigate, or perhaps a corvette. But… it’s hard to be sure. All the same, now you know.