Columbia subject headings:
Brown family--Correspondence.
Colorado--Biography.
Frontier and pioneer life--Colorado.
Frontier and pioneer life--New Mexico.
New Mexico--Biography.
Pioneers--Colorado--Correspondence.
Pioneers--New Mexico--Correspondence.
Harvard subject headings:
Brown family--Correspondence.
Colorado--Biography.
Frontier and pioneer life--Colorado
Frontier and pioneer life--New Mexico
New Mexico--Biography
Pioneers--Colorado--Correspondence.
Pioneers--New Mexico--Correspondence.
Princeton subject headings:
Brown family--Correspondence.
Colorado--Biography.
Frontier and pioneer life--Colorado.
Frontier and pioneer life--New Mexico.
New Mexico--Biography.
Pioneers--Colorado--Correspondence.
Pioneers--New Mexico--Correspondence.