That afternoon we hooked up with the REI crowd; and, led by our ace guides Christina and Iñaki, headed off for a walk back up to the Castillo de Gibralfaro, then down into the city to check out the cathedral and Picasso's birthplace, and finally dinner. By this time Patti's voice had changed to a horse growl, but there were no signs of contagion among the rest of us. I woke up the next day with a sore throat.