> slept for only 4 hours a day I've only really seen this mentioned in comments. All references I could find state that he often slept until late (for example,

> slept for only 4 hours a day I've only really seen this mentioned in comments. All references I could find state that he often slept until late (for example, he liked to sleep until after 10AM). I would be wary of glorifying extremely short sleep patterns, they are unhealthy for 90% of the population.