We mean to metropolize to-morrow, and you will address your next to Piccadilly. We have got the Duchess of Devon’s house there, she being in France…
Lord Byron
Last Spring, I too ‘metropolized’ to London for the day and on a quiet and chilly afternoon – I went for a stroll along Piccadilly to take a lingering look at the abode which was the scene of his short and difficult union with the unfortunate, former Annabella Milbanke AND the inspiration for the creation of the Ghost of Piccadilly.

The fact that Byron apparently descended into a brandy induced breakdown after the arrival of the two unwanted house guests for an extended visit probably did little to help restore the stormy waters of marital harmony.
The first house guest was Byron’s ‘Dearest Guss’ – the Hon. Augusta Leigh and the other who arrived a little later was a Bailiff who presumably received a far less affectionate term of endearment!

Although the idea of 13 Piccadilly Terrace has long since captured my imagination; it is believed that the house has been rebuilt over the intervening years and is now a part of 139 Piccadilly which can easily be spotted after crossing over Old Park Lane and before you arrive at Hyde Park Corner.

Walked early to look at my old house in Piccadilly – saw into the room where I have sat with him, and felt as I had lived there with a friend who was long since dead to me…
No sense of past agony – all mournfully soft. My thoughts floated peacefully into other channels as soon as I had left the spot…
Lady Byron

Mournfully soft?
I love the juxtaposition of these words used by Annabella as she too had stood outside this building in September 1820 and mused about her relationship with her impossibly enigmatic and brilliant spouse.

No sense of past agony?
Oh! How I wish these walls could talk!
Sources Used:
The Life and Letters of Anne Isabella Lady Noel Byron Ethel Colburn Mayne (London: Constable & Co Ltd 1929)