According to some stories the hand of Saint James somehow became separated from his body and in 640 was being stored by the Bishop of Torcello of Venice before being a part of the collection of the German Imperial chapel in 1072. In 1133 it was given to Reading Abbey’s founder by Henry I (or possibly the daughter of Henry I Matilda who was the widow of Henry V Emperor of Germany [Emperor Frederick Barbarossa did ask for the hand’s return but was politely refused and sent many gifts in return]). The hand is why the symbol of Reading Abbey had upon it three scallop shells. The symbol of Reading Abbey (from http://www.british-history.ac.uk/vch/berks/vol3/pp336-342 ) The same Scallop shells appear on many coats of arms associated with Reading including for the University there.
A blog about the Pilgrimage to Santiago de Compostela