These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Sir Percy Hits Back reveals that Chauvelin has an 18-year-old daughter. Count how many adaptations make him an ex-suitor or love interest for the 25-year-old Marguerite. Not a lot of hindsight is even required here, since almost the first thing the original novel says about him (even before the first "fox-like") is that he's "nearer forty than thirty".
In The Life and Exploits of the Scarlet Pimpernel, written by Baroness Orcy's son, Sir Andrew recalls the day Blakeney explained his reasoning behind adopting the scarlet pimpernel motif and his m.o. of leaving his calling card whenever he made a rescue: