Anna looked at me and shook her head. Damn! I felt foolish for worrying more about my hat than about Alberto. I moved my pack next to him and pulled out my first aid kit. Sandra cleaned the blister carefully, swabbing alcohol around the bulge with the tip of her pinky. I lit a match to sterilize the tip of a needle, threaded it and dipped needle and thread in alcohol. Alberto groaned. Sandra discovered another small blister on his left foot. With the blackened point of the needle, she pierced one blister and then the other, pressing them lightly to release the serum, then she picked up the iodine and squirted it liberally on the two lesions. Alberto closed his eyes, clenched his teeth and curled his toes as his calves tightened.