Columbia subject headings:
Anderson, S. (Samuel), 1839-1881--Correspondence.
Canada--Boundaries--United States.
Canada--Surveys--History.
Harris, Joseph S. (Joseph Smith), 1836-1910--Correspondence.
Surveyors--Correspondence.
United States--Boundaries--Canada.
United States--Surveys--History.
Harvard subject headings:
Anderson, S. (Samuel), 1839-1881--Correspondence.
Canada--Boundaries--United States.
Canada--Surveys--History.
Harris, Joseph S. (Joseph Smith), 1836-1910--Correspondence.
Surveyors--Correspondence.
United States--Boundaries--Canada.
United States--Surveys--History.
Princeton subject headings:
Anderson, S. (Samuel), 1839-1881--Correspondence.
Canada, Western--Description and travel.
Canada--Boundaries--United States.
Canada--Surveys--History--Sources.
Harris, Joseph S. (Joseph Smith), 1836-1910--Correspondence.
Northwest boundary of the United States--History--19th century.
Northwest, Pacific--Description and travel.
Surveyors--Canada--Correspondence.
Surveyors--United States--Correspondence.
United States--Boundaries--Canada.
United States--Surveys--History--Sources.