History 20 History and criticism 8 American literature 5 Diplomatic relations 4 Foreign relations 4 Politics and government 4 Criticism and interpretation 3 Doctrines 3 English language 3 Indians of North America 3 Indigenous peoples 3 Manners and customs 3 Mexican War, 1846-1848 3 Rhetoric 3 Social life and customs 3 Study and teaching 3 American poetry 2 Authors, American 2 Corporations 2 Early modern 2 English poetry 2 Frontier and pioneer life 2 In literature 2 Literature 2 Mexican Americans 2 Philosophy 2 Ranch life 2 Sports 2 Theology, Doctrinal 2 West (U.S.) in literature 2