Documentos inéditos, vol. X, p. 220: '...yo tengo flaca memoria, y despues que estoy en la cárcel he perdido gran parte della,...'
Documentos inéditos, vol. X, p. 193: 'Es imposible acordarse memoria de hombre de todo lo que en las dichas juntas se ha dicho, mayormente que con la cólera de la disputa, algunas veces salen de todos los términos de razon y modestia los hombres, y se ciegan de manera que dende á poco ellos mismos no saben lo que han dicho.'
Luis de Leon's memory betrayed him as regards the signatures attached to the Vatable Bible. He was under the impression that he had signed a copy which was handed over to Francisco Sancho. In this he proved to be mistaken. On thinking the point over, Luis de Leon suggested that he must have signed a copy in the possession of the Salamancan bookseller, Gaspar de Portonariis; this impression was likewise mistaken. (Documentos inéditos, vol. X, pp. 520-527.)
An amazing lapse of memory led Luis de Leon astray with respect to Bartolomé de Medina; as Medina did not take his degree till 1570 (Documentos inéditos, vols. X, p. 323, and XI, p. 340), Luis de Leon felt justified in stating that his opponent did not take part in the revision of Vatable's Bible, which (such was the prisoner's impression) was finished in 1569. The discovery of Medina's signature in the Sancho copy of Vatable (Documentos inéditos, vol. X, p. 522) rendered this position untenable. The fact appears to be that the Old Testament was revised in 1569; owing to the absence of Sancho and Luis de Leon, the revision of the New Testament was suspended; it was not finished till 1571, and thus Medina was enabled to sign the Vatable Bible. It seems clear that Luis de Leon had no head for dates. He was, as we have seen (p. [94]), doubtful as to when he was arrested, and he was capable of imagining that a sitting of the Valladolid court had been held a week before, when no such sitting had taken place. (Documentos inéditos, vol. XI, p. 18.)