caption: The image shows an open book with a drawing of a man's face on it. The book is believed to be Leonardo da Vinci's manuscript, which contains text and drawings. The man in the drawing is wearing a white shirt and has a serious expression on his face. His eyes are focused on something in the distance, and his mouth is slightly open, as if he is about to speak. The text on the page is written in black ink and is surrounded by a thin black border.