Legends of Charlemagne by Thomas Bulfinch

Orlando, on the loss of Angelica, laid aside his crest and arms, and arrayed himself in a suit of black armor expressive of his despair. In this guise he carried such slaughter among the ranks of the infidels that both armies were astonished at the achievements of the stranger knight. Mandricardo, who had been absent from the battle, heard the report of these achievements, and determined to test for himself the valor of the knight so extolled. He it was who broke in upon the conference of Zerbino and Isabella, and their benefactor Orlando, as they stood occupied in mutual felicitations, after the happy reunion of the lovers by the prowess of the paladin.

Mandricardo, after contemplating the group for a moment, addressed himself to Orlando in these words: "Thou must be the man I seek. For ten days and more I have been on thy track. The fame of thy exploits has brought me hither, that I may measure my strength with thine. Thy crest and shield prove thee the same who spread such slaughter among our troops. But these marks are superfluous, and if I saw thee among a hundred I should know thee by thy martial bearing to be the man I seek."