Anna Marie Sanderson Olson

Hans and Gertrude Sanderson were residents of Sarpsborg (or were at least born in or near there). Hans was born December 9th, 1828, and Gertrude was born March 2, 1838. They left for Quebec in 1878. I would like to know anything about the voyage, including what family members went with them. I believe their daughter, Anna Marie Sanderson, who married a man named John Olsen, left later. I recently found that their first child, Elmer, was likely born while they were still in Norway, on April 24th, 1879. Anna Marie Sanderson was born in 1858. I would like to know when they left Norway, and anything about their voyage.