Chronicle of King João I, part two, ch.22-23 -'How the King and the Constable departed from Guimarães' and 'How the king left from Torres Novas on his way to Santarém'
Itinerary of King João I of Portugal and the Constable Nuno Álvares Pereira marching from Torres Novas to Santarém, trying to surprise invading Castilian forces camping on the outskirts of Santarém.