I don't see Titeux's bias, in case he has any - it is to show how badly Dupont was mistreated - he brings strong arguments for that. Instead of just stigmatising his work as being biased - lets deal with his arguments, and lets discuss them.

Another good book about Baylen, and also available on google

Clerc : Guerre d'Espagne - Capitualtion de Baylen - Causes et Conséquneces, Paris 1903