Liverpool-Kritiania, October 1914

I am trying to trace a journey by one or two Russians from Genoa-Nice-Marseilles-Paris-Boulogne-London-Liverpool-Kristiania-Stockholm-Petrograd. They were travelling home around war-torn Europe. One or both of them arrived in Stockholm on October 15th or 16th, having left London for Liverpool on October 10th. I think this means that they boarded the S.S. Aaro at Liverpool on 10th. Can anyone tell me if there is another ship they could have used. How long would the voyage to Kristiania have taken and when did the Aaro arrive? Is there any chance of finding a passenger list? TGillam