Complex sentence: During this period he was selling more paintings in the US than in Ireland and in 1968 he finally relinquished the tenancy on his Raglan Lane mews in Dublin and moved to Tangier, Morocco on a more permanent basis.
Split into simpler sentences: During this period he was selling more paintings in the US than in Ireland. In 1968 he finally relinquished the tenancy on his Raglan Lane mews in Dublin and moved to Tangier, Morocco on a more permanent basis.