In 356 he left Palestine and went again to Egypt; but the accounts given in the Vita of his travels during the last fifteen years of his life must be taken with extreme caution.
In the main this conclusion substantiates the verdict of Stubbs, who has published the Vita et mors in his Chronicles of the reigns of Edward I.
The year 1520 saw the composition of the Arte della guerra and the Vita di Castruccio.
Some doubt exists concerning Geoffrey's share in the compilation of the Vita et mors Edwardi II., usually attributed to Sir Thomas de la More, or Moor, and printed by Camden in his Anglica scripta.
Recent scholarship, however, asserts that More was no writer, and that the Vita et mors is an extract from Geoffrey's Chronicon, and was attributed to More, who was the author's patron.