Well, as far as history goes, I've got a focus on the 17th Century and the Classical era. I've dabbled a bit elsewhere, but those are my two areas that I could actually teach and so forth. JMS on the other hand, knows a lot about the 20th Century along with other general knowledge.

In A Scandal in Belgravia, which was the first episode of season 2, Sherlock references the Coventry blitz, which Sheridan also mentions. I don't remember which episode it was, but I remember you commenting that you hadn't heard of it before then. XD

Edit: sorry for the edits. My spelling has not made sense.