Duke Of Connaught Leaves After Annual St. John Of Jerusalem Service Duke of Connaught , the Grand Prior , attend the annual commemoration service of the Order of St . John of Jerusalem at the Grand Priory Church , St . John ' s Gate , Clerkenwell . Before the service he inspected members of the St . John ' s Ambulance Corps . Photo Shows : The Duke of Connaught in his robes , leaving the Grand Priory Church after the service . 24 Jun 1936 *** Local Caption ***