Marguerite's betrayal?
How does 'Chovlon' learn of the Scarlet Pimpernel's identity? Is it through that twisted version of Marguerite's understudy, Minette? And if so, how does that really qualify as betrayal? Marguerite merely throws Chauvelin a scrap of information about a safe house (the ONLY safe house, apparently) that the League use in Paris. Why mess with the plot line, if it doesn't make any sense once it's been changed?
"Tony, if you talk that rubbish, I shall be forced to punch your head" - Lord Tony's Wife, Orczy