SS Oslo from Kristiania, which ship from Hull?

My great-grandparents emigrated from Norway to Canada in 1907. Per the Digitalarkivet: Emigrants sailing from Kristiania 1871-1921 their names were: Karl Alfred Andreass. Nerengen (Ols.)born 05.01.85, Marie Nerengen b. 24.10.86 and daughter Elise Marie Nerengen b. 23.04.07. I believe Nerengen is the farm name. Their residence was listed as Lunner (Nittedalen). They emigrated on June 8, 1907 on the ship OSLO, under the agent Bennett and their destination was B.C. Canada. I assume they sailed from Oslo to Hull, and then onwards. Once in Canada they went by the names Carl Alfred Olsen, Marie Olsen and Elise Olsen. How would I find out which ship they sailed across on? My grandmother remembers her father talking about seeing the statue of Liberty so I think they must have come through New York, and have tried to search Ellis Island with all the above names. Do you have any ideas where I should be looking next? Thank you.