Calling Call of Cthulhu players!

I know there are people who read my journal who are roleplayers. Friend of mine is DMing Call of Cthulhu and wants to know how much it would have cost to ride the Orient Express in the 1920s. It doesn't seem to be Googleable because Google is full of hits from modern-day travel guides about "going back to the 1920s" via the company that's bought up a load of old Orient Express carriages and renovated them.

We know about Murder on the Orient Express, and I found a book in UCL Library that I can look through next time I'm in London, but I'm sure some of you have done this research already. Might as well share brains, yes?