After his return from Egypt, Jacotin worked on preparing the plates for publication, but in 1808 Napoleon formally made them state secrets and forbade publication. This was apparently connected with Napoleon's efforts at the time to establish an alliance with the Ottomans. It was not until 1828–30 that the engraved plates could be published, as found in "Palestine and Egypt under the Ottomans" By Hisham Khatib.[1]