Regarding the ordeal of French troops captured at Baylen, I strongly recommend the book by Francisco Luis Diaz Torrejon "Las aguilas vencidas de Baylen" (FEHME 2015, 20 euros), that carefully documents the initial dispersion and later reunion of prisoners marched towards Cadiz. He is currently preparing another book dealing with the pontoons and the isles (Cabrera, Majorca, Canary islands). I can get arrange for a copy to be sent to those interested.

Jorge