 In 1490 and 1491 Celling was occupied with Richard Foxe, at that time the bishop of Exeter, in the negotiations between England, France, and Brittany.Some three years later he died on 10 December 1494.He was buried in the martyrium of Thomas Becket, in a richly blazoned tomb, on which was inscribed a long epitaph narrating his embassies to France and Rome.