Thanks, Steven, but I think that Madden, although being referred to by Oman, has nothing to do either with the events of the Portuguese Brigade of the 6th Division on October 8th, or the events of the 7th Division on the next day.
In the letter to Colville in the Dispatches, the name of the commander of the Portuguese Brigade (6th Division) is omitted. At that time, it was James Douglas, so I think there's a small imprecision in Oman.

Jorge