On 20 July, the day after the battle if the Annales Complutenses can be trusted, Alfonso's alférez, Martín Alfónsez, confirmed a private donation to Sahagún.
On 20 July, the day following the battle, as reported by the Annales Complutenses, Alfonso's seneschal, Martín Alfónsez, confirmed a private gift to Sahagún.