The Jesuit Guy Tachard (1648–1712) first came to Siamwith the Chaumont-Choisy embassy of 1685 as one ofsix Jesuits destined for missionary work in China.The group was headed by Fr de Fontaney (1643–1710).The decision of the Abbé de Choisy (1644–1724), whoheld the post of coadjutant ambassador, to withdrawfrom the diplomatic scene and effect a retreat priorto his ordination as a priest in Lopburi on 10December 1685 enabled Tachard to replace him asinterpreter of Phaulkon (c.1647–1688), theinfluential Levantine adventurer then holding thefunctions, though not the title, of minister oftrade and foreign affairs (phrakhlang) for King Narai (r.1656–1688).Tachard was then charged with secret negotiationswith the court of Louis XIV, most particularly withFr de La Chaize, the king's Jesuit confessor, andthe Marquis de Seignelay, the secretary of state forthe navy, to negotiate the lease of a port and thedispatch of persons of rank to occupy key posts inthe Siamese kingdom. In Paris, he lost no time inpublishing his account of the first French embassyto Siam, padding it with unacknowledged extractsfrom one of the other Jesuits in his party, Fr deBouvet.