Henry Thompson

In the Harley Quin short story The Sign in the Sky, Henry Thompson is the secretary of Sir George Barnaby. At the time that the murder of Lady Vivien Barnaby at Deering Hill, Thompson was away in Londom attending a business meeting.

Shortly after the murder, Thompson contacted a Canadian acquaintance, Mr Denman and asked him to help find a post for Sir George's housemaid Louisa Bullard. Thompson told Denman that Sir George was anxious to get the girl out of England quickly for personal reasons. A sum of money was sent to Denman to raise the wages to make them attractive.

For Mr Satterthwaite, this haste to get the housemaid away "gave one furiously to think". But why, and was Thompson acting for himself or on behalf of his employer.