Columbia subject headings:
Artists--Germany--Biography.
Artists--Germany--Correspondence.
Grashof, Otto, 1812-1876--Correspondence.
Grashof, Otto, 1812-1876--Travel--South America.
Grashof, Otto, 1812-1876.
South America--Description and travel.
South America--In art.
Harvard subject headings:
Grashof, Otto, 1812-1876--Correspondence.
Grashof, Otto, 1812-1876--Journeys--South America.
South America--Pictorial works.
Princeton subject headings:
Artists--Germany--Biography.
Artists--Germany--Correspondence.
Grashof, Otto, 1812-1876--Correspondence.
Grashof, Otto, 1812-1876--Travel--South America.
Grashof, Otto, 1812-1876.
South America--Description and travel.
South America--In art.