Trivia: What unusual writing method did Leonardo often use?
A Caesar cipher
Correct Answer: Mirror writing
So why is this answer correct? : Leonardo’s records were written backward and read from right to left — a type of script known as “mirror writing,” because it can be most easily read in a mirror. Although he never revealed why he wrote in this way, a popular theory is that the artist was left-handed and this avoided ink smudges. Others believe it made it harder for people to steal his ideas. Anything that Leonardo wrote for public use was written to be read from left to right.