 The incident thus established the immunity of members of the Commons from civil arrest while the House was in session.During the Scottish campaign of 1547 Ferrers was a commissioner of transport, and is described by William Patten in "The Late Expedition in Scotland" as being at the time 'a gentleman of my lord Protectors'.Ferrers survived Somerset's downfall in October 1549 and execution in January 1552, and was appointed by the Duke of Northumberland to devise entertainments to amuse the young King Edward VI during the Christmas season of 1551–2.