Complex sentence: The Fieschi Letter was written to Edward III in circa 1337 by a Genoese priest at Avignon, Manuele Fieschi (d.1349), a papal notary and a member of the hugely influential Fieschi family, who later became Bishop of Vercelli.
Split into simpler sentences: The Fieschi Letter was written to Edward III in circa 1337 by a Genoese priest at Avignon, Manuele Fieschi (d.1349). He was a papal notary and a member of the influential Fieschi family, who later became Bishop of Vercelli.