Sorry to bug into the conversation, but considering how wide and far the viking/norse trade routs went... I think I once saw a map that insinuated some went either as far as China itself or at least withing reach of the Silk Road, and according to wiki tea has been known in Asia since 200 BC). So, with a bit of artistic license, it's not entirely impossible for Jeeves the Viking to have got his hands on some tea. Maybe.

Again, apologies for intruding. :')