It would appear that NARA only has the following manifests for Portland:
Portland, Maine, 1820-1868, and 1893-1943.
http://www.thegenealogyspot.com/ShipsLists-Online/usa/maine....Although Norway Heritage shows 4 winter sailings for the Scandinavian in 1871, no Trinder appears in their search. You might want to try other variations of the surname.
http://www.norwayheritage.com/p_ship.asp?sh=scan1http://www.norwayheritage.com/pasquest.asp