Day 13 - 1832km Caceras, Spain.  I'm not sure if it was the psychological blow of running out of malt loaf or if someone had snuck some bricks into my panniers but today was a real struggle. Fortunately the tail wind continued and despite having to cross the Sierra Gredos, which provided some beautiful scenery, I was largely descending off the plateau. By the afternoon my legs were lifeless, fortunately a couple of spanish riders have just treated me to a much needed spanish feast and a few beers, I can't wait for a rest in Tarifa but for now onwards and southwards.