Emmuska Orczy 
I Will Repay 

It’s 1783 and wealthy Paul Déroulède has offended the young Vicomte de Marny by speaking disrespectfully of his latest infatuation, Adèle de Monterchéri. Déroulède had not intended to get into the quarrel but had a tendency to blunder into things — ‘no doubt a part of the inheritance bequeathed to him by his bourgeois ancestry.’

I Will Repay is a sequel novel to the Scarlet Pimpernel. The second Pimpernel book written by Orzcy, it comes third in the series and should be read after Sir Percy Leads the Band and before The Elusive Pimpernel.