Charles COLBERT DE CROISSY (1629–1696), brother of the great Colbert, administrator, intendant of Amiens and Soissons in 1666. L.S., Amiens, August 23, 1666; 1 page, in-4. Plague in Picardy. “The King, wishing to spare no effort to ensure your safety and prevent the spread of the plague in your city, has ordered me to seek out a person experienced in the matter of quarantine measures”; Colbert has appointed Mr. de La Cointe “to establish, under the orders of the Governor or the King’s Lieutenant and of Mr. Nacquart [governor of Dunkirk], all the police measures and discipline he deems necessary to halt the spread of the contagion”…