A dirty little backstreet in London, bordered upon the east by Tottenham Court Road and upon the south by Oxford Street. A dirty little backstreet, shadowed and unfashionable, the walls darkened with unattended soot, the windows blinded with grime. It was home to the backs of restaurants on one side and the rears of glittering retail emporia upon the other, and little else but for a couple of residences, a pawnbroker, and a bookshop. The sign over the window read “Vesperine & Daughter. Dealers in Rare & Antique Books” and, while this was true, it was also somewhere short of the whole truth.