Arthur Ua Clerigh, Catholic Encyclopedia (1913)
“ Adrian excommunicated William. After the departure of Frederick, Adrian collected his vassals and mercenaries and marched south to Beneventum, a papal possession, where he remained until June, 1156. It was during this time that John of Salisbury spent three months with him, and obtained from him the famous Donation of Ireland (see page 158) . The fortune of war favoured William. He captured Brundusium, with an immense store of provisions and munitions of war, and five thousand pounds' weight of gold that the Greek Emperor, Manuel I, intended for his ally the Pope. ”
