 Complete the following phrase:  All traces of him disappear until an archival document found in the main archive of Budapest which unraveled the whereabouts of the painter after 1697. A copy of a letter, dated 21 May 1708, signed by Metropolitan Isaija Đaković asking Serbs to join Jovan Tekelijas militia against Francis II Rákóczi who was threatening the Archduchy of Austria with his so-called 