Columbia subject headings:
Harvard subject headings:
California--Antiquities.
Frémont, John Charles, 1813-1890.
Howitzers--Sierra Nevada (Calif. and Nev.)
Sierra Nevada (Calif. and Nev.)--Antiquities.
Princeton subject headings:
California--Antiquities.
Frémont, John Charles, 1813-1890.
Howitzers--Sierra Nevada (Calif. and Nev.).
Sierra Nevada (Calif. and Nev.)--Antiquities.