Columbia subject headings:
Harvard subject headings:
Explorers--Africa, Southern--Correspondence.
Explorers--Scotland--Correspondence.
Livingstone, David, 1813-1873--Correspondence.
Missionaries, Medical--Africa, Southern--Correspondence.
Missionaries, Medical--Scotland--Correspondence.
Princeton subject headings:
Explorers--Africa, Southern--Correspondence.
Explorers--Scotland--Correspondence.
Livingstone, David, 1813-1873--Correspondence.
Missionaries, Medical--Africa, Southern--Correspondence.
Missionaries, Medical--Scotland--Correspondence.