Thingvalla 1880

My great grandparents came from Denmark aboard the Thingvalla in 1880. I have learned that they left Denmark on 9 April 1880. The ship was heading for New York, but lost her screw in the North Atlantic and had to go to Boston first. The passengers were transported to New York by train. When did the Thingvalla arrive in Boston? Are the passengers registered as "Boston" arrivals even though they ended up in New York as planned (via detour)? Thanks! Gary Jacobson