Thornton Wells is Cobb's stepfather as Cobb was married to his daughter Esme, until she died. Early sixties, a very dapper dresser, quite a ladies man.
Has a mysterious past where he did certain work for the Foreign Office. Now supposedly retired and running an antique bookshop but it seems to have a very select clientele and Cobb suspects that he is still in business as a freelancer for the British Secret Service.
Appears in Split Infinity, Hair of the Dog, The Speed of Dark, The Great Game, A Londum Yuletide and Quantum of Solstice.