. . "Travel." . . "Romania" . . "Romania." . . . . . . . . "The Danubian principalities, the frontier lands of the Christian and the Turk" . "The Danubian principalities, the frontier lands of the Christian and the Turk"@en . . . . . . . . "The Danubian principalities the frontier lands of the Christian and the Turk"@en . "The Danubian principalities : the frontier lands of the Christian and the Turk"@en . . . "The Danubian principalities the frontier lands of the Christian and the Turk" . "The Danubian principalities : the frontier lands of the Christian and the Turk" . . . . . . . . . . . "The Danubian Principalities, the Frontier Lands of the Christian and the Turk" . . "Balkan Peninsula" . . "Balkan Peninsula." . "1800 - 1899" . . "Moldavia" . . "Europe" . . "Wallachia" . .