When Jenner’s sister Pam was a young girl she noticed something puzzling one day on the bookshelf of the family’s house, in Cornwall, New York. It was the mid-1950s, and like millions of other American families in the 50s the Jenners had a set of encyclopedias. What was odd to Pam was the way in which her brother Bruce, 16 months younger, had arranged them: from A to Z, right to left. She noticed how her younger brother spelled “saw” as “was” and “was” as “saw.” Pam concluded, as would just about any older sibling caught up in her own world, that Bruce was just “a stupid younger brother.” Their mother, Esther, was puzzled. When she worked on spelling with her son she noticed that he spelled every word right one day and then completely forgot the next. “Bruce, you’re not concentrating. You’re daydreaming,” she said to him. In second grade, since he still could not read, he was held back. Teachers thought that the child, whose father, William, was a tree surgeon, was just lazy.