When was the Scarlet Pimpernel compassionate

Under the stress of all of her dealings with Chauvelin and the coolness of her husband, Lady Blakeney explains the circumstances that led her to denounce the Marquis de Cyr's family at the tribunal. But Percy says she's told him too late and he remains cool to her, even though deep down he still loves her. He shows compassion and still promises to save her brother.

I'm not sure if it is this novel but I know at one point he saves Chauvelin's daughter.

Many of the people he smuggles out of France are not nice people. They have made mistakes but Percy (the Pimpernel) still shows compassion.