Taryn:Thank you for all the information in your message dated Septembr 2, 2012.
Regarding when Emil and Dagny got married, the Dagney you found on the 1910 census is not the correct one.Dagney's family name was Halvorsen and she was born June 4, 1888, not March 21, 1890.Dagny had seven siblings, Carl, Olaf, Ole, Josephine, Alma, Marie, and Signe.
Dagny's sister Signe was the only sibling that did not come to the US.Do you have any information which would show what happened to her?I believe she was the youngest child.
The Emil Jacoben you reference who came to US in 1906, Is there any other information. It shows his year of birth as 1885 which matches, but is there a month and day (Emil was born on February 1).
In regard to the violin question, do you know of any orchestras which were in existence in the early 1900's?
Thank you for all your efforts.It seems each answer generates more questions.