Creating hand-drawn notes was a special habit of Leonard Ethan, on one hand, his knowledge of archaeology came mostly from the past, so it was natural for him to continue this practice.
On the other hand, after acquiring a series of skills through cards, Leonard felt that engaging in artistic creation was beneficial for his memory, and at the same time, it was also advantageous for secondary commercial development.
To give the simplest example, his notes from searching for the turquoise mine in the Sinai Peninsula have been compiled and published into a book, and although the sales are far from those of novels and fairy tales, the steady stream of income is not insignificant.
More importantly, such archaeology notes, endorsed by Egyptian officials, were recognized not only for their content accuracy but also morally, and thus were seen as educational articles for cultural heritage protection in many places.
