As the last days of what seemed like an interminable January faded, speculation about the next instalment of Robert Galbreath’s Strike-Ellacott series was given a welcome boost as J. K. Rowing posted a new header on her X homepage. Strike sleuths were quick to identify the Art Deco façade of Freemason’s Hall in London, which is the headquarters of the United Grand Lodge of England, the governing body for Freemasonry in England.