What do you do in the mali empire on time tangled island?

The fellow in 1387 AD has lost his bag of Salt Rocks. It is on Thomas Jefferson's roof in 1776 AD. (7 o'clock position on your Time Travel device)

The Declaration of Independence is there at 1387 AD. Go up and across to the right to reach the Timbuktu Inn. Piece together the puzzle of the artwork for the dealer man there.