Columbia subject headings:
Art historians--Germany--Correspondence.
Burckhardt, Jacob, 1818-1897--Correspondence.
Geymüller, Heinrich von, 1839-1909--Correspondence.
Historians--Switzerland--Correspondence.
Harvard subject headings:
Geymüller, Heinrich Adolf, Freiherr von, 1839-1909.
Princeton subject headings:
Art historians--Germany--Correspondence.
Burckhardt, Jacob, 1818-1897. Correspondence.
Geymüller, Heinrich Adolf, Freiherr von, 1839-1909--Correspondence.
Historians--Switzerland--Correspondence.