The London of Sebastian St. Cyr: Pickering Place

I have news about THREE different developments I've been hoping I could announce this week (don't get too excited; only one of them is about Sebastian St. Cyr and no, it's not a film deal). But since my ability to talk about them keeps getting delayed, I thought I'd put up a post about Pickering Place.
Pickering Place is a tiny, totally enclosed square in London, just off St. James Street. It can only be entered through this tunnel-like passageway that's still lined with its original, 17th century oak paneling:
The square itself still has all its 18th century Georgian buildings. In Sebastian's time it was a pretty rowdy place, home to gambling dens and brothels and bear-baiting. It's also said to be the site of the last duel ever fought in London, when two bucks got into a quarrel in Whites and crossed the street to have it out in Pickering Place. Seems a pretty crowded spot to me, but then, one assumes they were drunk. 
The above tunnel runs between two old 16th century shops on St. James Street. One of them is Berry Brothers and Rudd, the famous wine merchants whose cellars run under the entire area. Berry Brothers is also the site of the large coffee scales where the Prince Regent and Beau Brummell used to weigh themselves. 

Sebastian has ventured into Pickering Place a few times in earlier books, but the square plays a key role in book #12, Where the Dead Lie, which is currently working its way through production and will be released in March 2017. 
Hopefully next week I can put up the first post about my news!