The subject of this paper is one unknown historical source: The Report of Eugene Schuler (September 28, 1876). (Papers to the Foreign relations of the United States, transmitted to Congress with the Annual of the President. December 4, 1876. Washington, 1876, 586-591: Note on the production and trade of the district of Philippopolis, № 313. The paper was prepared by Ivan E. Geschoff). The integral text of this report was supplied to us in March 2016 by H.E. Erich Rubin, US Ambassador to Bulgaria, to whom we express our appreciation. The lack of political will from the official authorities in London and Constantinople to investigate the horrors of the events of April 1976 in Bulgaria involves a half of dozen of Americans in immediate contacts with Bulgarians from the region of Plovdiv in the context of the so-called Eastern Question. The great American Bulgarian History expert James Clarke made a very appropriate reference – they were the right people, at the right place, in the right time. In both Bulgarian and American historiography their activities are well researched and appreciated presented – thus they left valuable imprint for the making of the Bulgarian national identity.
Key words: historical source, American-bulgarian political cooperation