- Jack is a veteran of the Special Air Service, having served in Northern Ireland, Afghanistan, Pakistan, and the Falklands. He attained the rank of Major, before retiring following an injury.
- For his military service, Jack was appointed a Commander of the Order of the British Empire.
- No one at the British embassy can readily explain exactly what it is Jack does there.
- Jack has spent four decades amassing one of the most comprehensive occult libraries in Europe. It remains in Europe.
- Jack is an Oxford man; he has a B.A. in Anthropology. His military career precluded further academic ventures.
- Jack supports Tottenham Hotspur F.C.
- Jack has many tattoos and as such rarely shows off any skin.
- Jack has a preference for pale blondes.
- After leaving the military, Jack worked as a mercenary in places like Africa, Central America, Russia, Japan, the Middle East...
- There are some people at the Hague who would very much like to speak with Jack.