Columbia subject headings:
United States--History--Civil War, 1861-1865--Hospitals.
Harvard subject headings:
Nurses--United States--Correspondence.
Parsons, Emily Elizabeth, 1824-1880--Correspondence.
United States--History--Civil War, 1861-1865--Hospitals
Princeton subject headings:
United States--History--Civil War, 1861-1865--Hospitals, charities, etc.