Brilliant. Is there a possibility it was St. Petersburg instead of Moscow? That would make sense of the smell of the sea and nail down all the clues. I’m catching up on the thread, but you all may know more quickly.
If it is those four places, what does that suggest in terms of an answer for where Port should be looking?
(Edited to add a link to the post that appears to have found the answers in order: Mexico City, Paris, St. Petersburg, Montréal. But this doesn’t specify what answer we should give to @Eaves.)