Ezio returned to Leonardo's workshop after obtaining the final painting. Salaì searched every painting, but found nothing until Ezio used his gift to search the paintings. Ezio found several invisible drawings on the paintings and drew them out on paper, seeing them as pieces of a map. Ezio properly aligned the pieces and found the location to the vault.
Dialogue
Ezio enters Leonardo's workshop, where Salaì is examining one of the recovered paintings.
Ezio:Have you found anything?
Salaì:Nothing is there, no pages, nothing.
Ezio:That cannot be. Something must be special about them. Think.
Salaì: I am done thinking. These paintings are a blank slate.
Ezio:Salaì, doesn't Leonardo conceal his research?
Salaì:He frequently writes backwards... Ezio, he also experimented with inks, including an ink that vanishes! But we can't see invisible ink... can we? Ezio, use your gift!
Ezio:You know about that too?
Ezio speaks to Salaì as he sits by the fireplace.
Ezio:I am going to solve this.
Salaì:I hope so. I cannot take much more.
Salaì:Do you think they would hurt him? Leonardo is terrified of violence.
Ezio:Unfortunately, this world is a violent place.
