In accordance with the fashion of the epoch, a Latin inscription on the wall indicated to the learned passer-by the pious purpose of this cell. The custom was retained until the middle of the sixteenth century of explaining an edifice by a brief device inscribed above the door. Thus, one still reads in France, above the wicket of the prison in the seignorial mansion of Tourville, Sileto et spera; in Ireland, beneath the armorial bearings which surmount the grand door to Fortescue Castle, Forte scutum, salus ducum; in England, over the principal entrance to the hospitable mansion of the Earls Cowper: Tuum est. At that time every edifice was a thought.