
It’s still a tentative title, but Book 5: Box 850 is done.
Box 850 is the colloquial term for the British Intelligence Service, specifically MI6, which wasn’t actually acknowledged as existing until 1994.
At the time of the book, the Chief of MI6 would have been Admiral Sir Hugh Sinclair (1923–1939) and operated at the time out of 54 – Broadway, off Victoria Street, London.
It seems that MI5 concentrated more on internal threats, and MI6 more on external, but in the case of Mr. Howard, it is not made clear what his connection is to the Secret Service, it is only intimated that he comes from those offices. MI5 has its own colloquial name: Box 500 (after its official wartime address of PO Box 500).

So I suppose I could scoop that as a name instead. What do you think? I don’t know why but Box 850 sounds cooler and more mysterious than Box 500. But maybe that’s just me.
I think it depends on the focus of Mr Howard – in your book is he following a case that has foreign implications or is entirley domestic…?
i like box 500. don’t know why, but sounds better.
I like Box 500 better. Box 500: A Portia Adams Adventure.Sounds good. When are you going to post one of thse books up here for us to look at?