Sir Walter Raleigh

In speaking of the difficulty which exists in obtaining a perfect knowledge of any event, reference is often made to Sir Walter Raleigh having witnessed an occurrence, while confined in the Tower, and that two witnesses gave such a different account from each other as well as from himself, that he threw his MS. history into the fire. In what contemporary work is this recorded? A similar discrepancy in evidence is mentioned with reference to the celebrated tourney at Tiani, in 1502, in Prescott's *Ferdinand and Isabella*, vol. iii. p. 45.