sentences:  Tosi and Robaut spent the winter of 1886-87 in Canada at the confluence of the Yukon and Stewart Rivers.When in early 1887, upon entering Alaska, they learned of the death of Archbishop Seghers, Tosi considered himself to be in charge, at least for the time being, of ecclesiastical affairs in Alaska.The following Summer he made a trip to the Pacific Northwest to consult with the Superior of the Rocky Mountain Mission, Joseph M. Cataldo, who formally appointed him Superior of the Alaska Mission and entrusted him with the task of developing that mission.