Garnier entered the Society of Jesus in 1660; after two years as a novice, he sailed for Canada in October 1662. There he taught grammar at the Jesuit college, while studying theology under
Jérôme Lalemant and learning Indian languages in preparation for missionary work. In 1668, Garnier became the first Jesuit to be ordained in Canada. He went first to the
Oneida, but in a few months changed the field of his labours to the
Onondaga mission.
Garaconthié, the Onondaga chief, received him with every evidence of friendship, and, at his request, rebuilt the chapel of St. Mary. as well as access to medicine. When trouble arose in 1683 between the French and the Senecas, Garnier went with de Lamberville to
Governor de la Barre to urge compromise and moderation. He was unable, however, to dissuade the latter from his policy of repression. When de la Barre led troops against the Senecas, they summarily defeated him, leading de la Barre to return to France in disgrace. His replacement,
de Denonville, betrayed the Seneca leaders under a flag of truce, before marching through their territory and burning their villages. The missionaries were recalled at the outbreak of these hostilities, and were unable to return during the following twenty years of conflict. During that time, Garnier lived at the settlements of Sault-Saint-Louis,
Lorette and
Caughnawaga. In 1701, the
treaty of Montreal allowed Garnier to return to his mission among the Senecas. There he remained until 1709, when
Schuyler's expedition once more made it necessary for him to return to Canada. His departure marked the end of missionary work among the Senecas; his notes and letters remain one of the principal and most accurate sources of information on this division of the Iroquois. In 1716, Garnier became superior of the missions in New France. He passed his remaining years among the various settlements along the
St. Lawrence River, retiring from active life in 1728. ==References==