E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Knight of the Wood or Knight of the Mirrors. So called because his coat was overspread with numerous small mirrors. It was Sampson Carrasco, a bachelor of letters, who adopted the disguise of a knight under the hope of overthrowing Don Quixote, when he would have imposed upon him the penalty of returning to his home for two years; but it so happéned that Don Quixote was the victor, and Carrascos scheme was abortive. As Knight of the White Moon Carrasco again challenged the Manchegan lunatic, and overthrew him; whereupon the vanquished knight was obliged to return home, and quit the profession of knight-errantry for twelve months. Before the term expired he died. (Cervantes: Don Quixote, pt. ii. bk. i. 11, etc.; bk. iv. 12.)