Patient Zero

"There is no longer much dispute, however, about the broad outlines of what constitutes a case of autism. The Diagnostic and Statistical Manual of Mental Disorders—the so-called bible of psychiatry—draws a clear map of symptoms. And to a remarkable degree, these symptoms still align with those of one 'Donald T,' who was first examined at Johns Hopkins University, in Baltimore, in the 1930s, the same boy who would later amaze a mentalist and become renowned for counting bricks.
"In subsequent years, the scientific literature updated Donald T’s story a few times, a journal entry here or there, but about four decades ago, that narrative petered out. The later chapters in his life remained unwritten, leaving us with no detailed answer to the question Whatever happened to Donald?
"There is an answer. Some of it we turned up in documents long overlooked in the archives of Johns Hopkins. But most of it we found by tracking down and spending time with Donald himself. His full name is Donald Gray Triplett. He’s 77 years old. And he’s still in Forest, Mississippi. Playing golf."

In The Atlantic, John Donvan and Caren Zucker visit "the first person ever diagnosed with autism."