The poem
King of the perennial holly-groves, the riven sandstone: overlord of the M5: architect of the historic rampart and ditch, the citadel at Tamworth, the summer hermitage in Holy Cross: guardian of the Welsh Bridge and the Iron Bridge: contractor to the desirable new estates: saltmaster: money-changer: commissioner for oaths: martyrologist: the friend of Charlemagne.
'I liked that,' said Offa, 'sing it again.'