Thanks for the sympathy for Ian's blisters.
For the record, we kind of knew that his boots were too small. Just 6 weeks before, he and I had hiked about 15 miles one day, but it was a day hike on much easier terrain than Cheaha, but he had few problems. This summer he will be going to Philmont Scout Ranch for a 10 day trek, and as he is still a growing boy, we are going to get him some new boots late in the spring. We were just trying to get a few more hikes out of his old ones. Now I imagine we will pick up a cheap pair (HiTec) to get him through the next 3-4 months. Oh well. Luckily he has a high pain tolerance, so he never really complained, he just said: "I've got blisters on both of my feet, can you check them out?" They ended up being nearly quarter sized, one on the side of each big toe; pretty obviously caused by outgrown boots. But once I dressed them, he hiked out without a word of complaint or even a comment.