Rudd Family from Toten (Rude, Ruud, Malterud)

Dear Norway Heritage members, I am hoping for some guidance. My relative, Johannes Pedersen Malterud (John Peterson Rudd in America) came to Madison, Wisconsin in 1868 along with 5 other professors to start a school or university, or univ. dept. in or near Beloit/Madison. Apparently he taught in Bergen first, and these educators were sent to Madison. I searched some Bergen records online at Digitalarkivet but came up empty. The family may have left Norway in late 1867 or early 1868. I can't find them on the 1870 US census, but it was during that same year when John Rudd and his wife, Carrie and daughter Mary moved to Becker County, MN. John's birthday was Apr 16, 1839, born at Malterud Farm in Toten (Oppland County). His father was Peter Johannessen Malterud also of Toten, and born on Helset Farm). Might anyone be able to point me in the right direction regarding researching passenger lists or information about professors being sent to America to help found schools? Family lore has it that John, Carrie (who was pregnant) and 5 other professors traveled in a large sailboat (not a steamship) and Carrie gave birth to her first child just a month after arriving in Madison. Carrie's last name has been stated as Gilbertson and Johnson! Thank you for any help whatsoever in locating emigration/immigration information or information about Norwegian educators coming to America. Thanks again! Mike Peterson Daly City, CA