Degonnor came to replace him, but sickness forced Degonnor to return to Quebec the next year. In September 1744, Pierre Potier* arrived

]. After four years of teaching Guignas went once more to the western missions. He asked to be allowed to take part, along with Father Nicolas Degonnor, in the expedition to the Sioux country commanded by

Boucher de Boucherville and Jesuit fathers Nicolas Degonnor and Michel Guignas, left Montreal on 16 June. Following a brief stop at Michilimackinac, the party – accompanied for a time

1749–50 and then returned to Quebec as bursar of the college (1750–56). In 1757 he replaced Father Nicolas Degonnor as superior of the Jesuits in Montreal, holding this office until his retirement in

, he met the Jesuit Nicolas Degonnor who was on his way from the Sioux mission to Quebec. The missionary was greatly interested in the data La Vérendrye was gathering and agreed to carry his reports