sentences:  He was one of the first two Jesuits missionaries (the other being Louis Robaut) to set foot in Alaska.As the first Superior of Jesuits in Alaska (from 1886 to 1897) and first to have ecclesiastical jurisdiction in Alaska (Prefect Apostolic from 1894 to 1897), he is regarded as the founder and organizer of the Church in North-Alaska.Ordained a (diocesan) priest in 1861, Tosi entered the Jesuits the following year in order to be sent to the 'American mission'.