This and other info are part of a new book on Ayrton, written by arguarbly the guy who knows more about Senna´s career, Lemyr Martins. The title is something like "a start named Senna".

The book is probably the most detailed account of Senna´s life, from childhood to F1 glory (Lemyr got a full access to inside-family info). It includes a detailed account of each of the 163 races that Senna should have taken part (he only raced in 161 because he DNQ for one of them and was not allowed by Toleman to race in another).
The book launch was yesterday (dec. 5th) in São Paulo, but I don´t know if there are plans to release it in english anytime soon (tough it´s very likely).
I already ordered my copy, btw.
