In 1161 he made peace with the West-Friesians. In a struggle over
Zeeland he became imprisoned in Flanders in 1167. In 1176 he supported
Emperor Friedrich Barbarossa in the battle of Legnano, for which he
received an imperial toll-post at Geervliet. In 1180 he restrained
the West-Friesians and participated, in 1189, in the third crusade
which brought him to Antiochia where he died.
Leo van de Pas