Note 55 — Chapter II · The History of the “Ambassadors” from 1654 to the Present Day. Chronology of the Picture.
Reading edition
The deed recording the attempted donation was drawn up at Milhars, 1st September, 1665. Roger de Guénégaud was the son of Henri Du Plessis Guénégaud, Marquis de Plancy, the well-known Secretary of State and Garde des Sceaux. This gentleman had married Isabelle (or Elizabeth) de Choiseul, daughter of Charles de Choiseul, Marquis de Praslin, and of Claude de Cazillac, aunt of M. de Cessac. As such, Roger de Guénégaud descended, through his mother, in as direct a line from the Dinteville heiress as the Marquis de Cessac himself. The latter lived on terms of intimate friendship with these relations. Mme. de Sévigné records having met M. de Cessac at Fresnes, the country place of Du Plessis Guénégaud. (Letter to the Marquis de Pomponne, 1st August, 1667.)