Haller, K. L. v., & Duncan, W. (1822). A letter of the celebrated Charles Lewis de Haller, member of the Sovereign Council of Berne, to his family, informing them of his conversion to the Catholic, Apostolical, and Roman Church. Printed by Wm. Duncan.

Haller, Karl Ludwig von, and William Duncan. A Letter of the Celebrated Charles Lewis De Haller, Member of the Sovereign Council of Berne, to His Family, Informing Them of His Conversion to the Catholic, Apostolical, and Roman Church. Washington City: Printed by Wm. Duncan, 1822.

Haller, Karl Ludwig von, and William Duncan. A Letter of the Celebrated Charles Lewis De Haller, Member of the Sovereign Council of Berne, to His Family, Informing Them of His Conversion to the Catholic, Apostolical, and Roman Church. Printed by Wm. Duncan, 1822.