This book is the French version taken from the Italian / German 1888 but from author reference Herbert denote of it oringnal source works done about Leonard da Vinci, which covers more than the first issue that came out in 1551, and the 1700s ones given in a French translation that travel to other language’s and author takes and impart is of the last one that was done up to 1910-1921, writing of it, which was rambled and thrown to gether in orginal book that took some time figure if the direction it was as well foot notes are here in color tral and the are that I had too alter palcement in color as well (--)definintion that I give to help with some words that have no direct translation of my knowlage in to english as well give a last view of all the other works that was written of Leonard work by people that interpreted his Hebrew style of writing and Sardine language, which is the last work of the theory studies of my works. Which from my note book has given a bridge to from the theory of art to a practice of doing art methods in the books that will follow this in due time.