This book dates back to 1716 from the original source done in Old French language of books block printers used in the Southern part of the country during 1700 century by Roland Freart, which from that now has been restored in away and modified into English and shows the reflection too the view of the Old French writings of Leonard of Vinci work that can be used to comparison with the German and Italian views of the same writing from the same original works of Leonard da Vinci. that show how much was done during that time and as well the way it was stated before if you can find the text that pro-date up to 1551 first Edition of the Masters works.