 Lamberton also wrote a letter to Philip of France asking for the King to help him gain freedom from England.Lamberton attended negotiations in 1309 as an "English" envoy, and his skill as a diplomat helped him to keep on good terms with both Edward and Robert.Lamberton would never again collaborate with the English and Edward even attempted to have him ousted from the See of St Andrews in 1318 by writing letters to the Pope charging Lamberton with treason.