About 1587.
Leonardo da Vinci wrote most of his personal notes in mirror writing. Most of his notebooks were written in mirror writing.
Leonardo da Vinci's journals are mostly written in mirror-image cursive. The reason may have been more a practical expediency than for reasons of secrecy as is often suggested. Since Leonardo wrote with his left hand, it is probable that it was easier for him to write from right to left.In mirror writing.
To write it for yourself, YOU have to do it.
I believe somebody has tried to write Leonardo da Vinci and failed.
No, sorry. Leonardo was not the first to do everything in this world.
at the age of 17
Leonardo da Vinci used his notebooks to help him with his paintings. He studied and made notes about the human anatomy, plants, and rocks in order to be able to make them more realistic in his paintings. Much of his notebooks contained his lab notes and ideas for inventions, such as his notes and ideas for flying machines.
No.
he used a quill to write and carcoal to draw
Yes
It is not known who taught Leonardo Da Vinci how to read and write. Though since he spent the first five years of his life with his mother it's likely she taught him or found a teacher who taught him.
Yes, Leonardo Da Vinci could write with one hand and draw with the other at the same time.