Thompson (The Shadow on the Glass)

In the short story The Shadow on the Glass, Thompson is the butler of the Unkertons at Greenway's House. Shortly after Moira Scott and Captain Jimmy Allenson were shot dead, Thompson came to tell Mr Unkerton that a gentleman, one Harley Quin had arrived to see him. Although Thompson told Quin that it was inconvenient, Quin insisted that he had an appointment, apparently to do with valuing some paintings.