Family Search - NORUM

My grandfather Martin George Norum lived in North Dakota and Died in Bismarck, ND in 1950. A Martin Norum arrived in New York as a passenger on the USS Saint Paul, 24 June, 1900. He boarded Saint Paul at SouthHampton, England that I beleive to be my grandfather, by established age and birthdate. My problem is, I have found a Martin Norum from Grytten and departing from Alesund Norway, but I am unable to connect this departure to an arrival point in England and the movement from there to Southhampton. I could use all the help I can get on this. Many thanks in advance for any assistance I may receive.