I just saw your message today, in 2011, because I had googled henri bertrand.
Well, What I know is that I had grown up with the father of my grandfather telling the story about General Bertrand.
I know about one of João Cancio's son's family story. Send me an email and I can tell you. I wont write too much because I dont know if you will read this message.
Rgds, Juliana Cancio