Viertes Capitel. "Das Methoden- problem in der modernen Mathematik": holograph, corrected (pp.84a-111), n.d. Box 29, Folder 568 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Ernst Cassirer papers, 1892-1958…
Viertes Capitel. "Der Zahlbegriff und seine logische Begrundung-- Zahlbegriffe und Zahlzeichen": holograph, corrected (pp. 50-84) [correspondstonopublished chapter], n.d. Box 29, Folder 567 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Ernst Cassirer papers, 1892-1958…
Viertes Capitel. "Die Briefe über aethestische Erziehung: Die Analytik des Schönen Stellung der Kunst im System der geistigen Kultur": draft, holograph, corrected, n.d. Box 49, Folder 992 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Ernst Cassirer papers, 1892-1958…
Viertes Capitel. "Die Zeit- anschauung": holograph, corrected (pp.148-227a), n.d. Box 30, Folder 588-89 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Ernst Cassirer papers, 1892-1958…
Viertes Capitel. "Die Zeit": holograph, corrected, incomplete (pp.390-463), n.d. Box 29, Folder 558 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Ernst Cassirer papers, 1892-1958…
Viertes Capitel. "Raum, Zeit und Zahl": holograph, corrected, incomplete(pp.624-68), n.d. Box 31, Folder 594 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Ernst Cassirer papers, 1892-1958…
Viertes Kapitel: draft, holograph, corrected Box 32, Folder 618-19 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Ernst Cassirer papers, 1892-1958…
VI. "Euklidische und Nicht- Euklidische Geometrie": holograph, corrected, n.d. Box 35, Folder 669 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Ernst Cassirer papers, 1892-1958…
VI. "Euklidische und Nicht- Euklidische Geometrie": typescript and holograph, corrected, n.d. Box 35, Folder 677 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Ernst Cassirer papers, 1892-1958…
VII. "Die Relativitätstheorie und das Problem der Realität": holograph, corrected, n.d. Box 35, Folder 670 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Ernst Cassirer papers, 1892-1958…