Thomas_Frederick Tout, 1911 Encyclopædia Britannica, Volume 8… (1911)
“ His army wasted away during the hot Spanish summer, and Edward himself contracted the beginnings of a mortal disease. In August 1367 Edward led the remnant of his troops back through the pass of Roncesvalles, and returned to Bordeaux early in September. He had exhausted all his resources on the Spanish expedition, and was forced to seek from the estates of Aquitaine extraordinary sources of supply. ”
