

The account comes from a web page I saved to my hard drive. Before uploading it, I checked it and found it dead, but still want to give credit, so here is the obsolete URL--http://members.aol.com/popvoid/TOC.html. Jim Morton, the essayist, uses Peridromophilia as a term for Sidis's love of street car transfers.
Peridromophilia Unbound:William James Sidis
By Jim Morton
The great geniuses of mankind are often said to be "born ahead of their time." William James Sidis, on the other hand, seems to have been born out of his time completely; on the wrong world, in the wrong dimension. Perhaps someday the world will understand "Willie" Sidis's strange genius, but that day is far off indeed.
Sidis was born in 1898. His father, Boris Sidis, taught psychology at Harvard and was considered one of the foremost psychologists of his day. The boy was named after William James, a leading psychologist and brother to author Henry James. Boris argued that traditional approaches to child-rearing obstructed the learning process. The elder Sidis was determined not to make the same mistake with his son.
He started by stringing words together with alphabet blocks above the child's crib. He eschewed the usual "googley-goo" baby-talk that adults lapse into around infants, speaking instead to the child in the same way he would speak to an adult. If the boy showed any interest in a subject, Boris encouraged his curiosity and study.
The effect of all this on the boy Sidis was astounding. By the time he was two, Willie was reading literature meant for adults; by age four he was typing letters in French and English; at age five he wrote a treatise on anatomy and dazzled everyone with a mathematical expertise few adults could match.