estando en Valladolid, los que eran de la parte del jnfante don Juan prendieron a Juan Furtado de Mendoça,
being in Valladolid, the-ones that were of the party of-the prince d.J. seized Juan Furtado of Mendoça,
While they were in Valladolid, the party of d. J. seized Juan Furtado of Mendoça, who belonged to the party of the prince d. E.