Complex sentence: The estates of Archbishop Stigand were seized nationwide in 1070 including one here and two holdings of Leofwin the noble of Caddington were taken on conquest who the Book adds held under King Edward's overlordship.
Split into simpler sentences: The estates of Archbishop Stigand were seized nationwide in 1070 including one here. Earlier seized were two holdings of Leofwin the noble of Caddington taken on conquest and which holder the Book adds held under King Edward's overlordship.