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NASA - Public Domain
Sailko - CC BY-SA 3.0
Published by "Students' coöperative society" - Public Domain
Government Printing Office - Public Domain
unknown - Public Domain
Public Domain
Dmitry Scherbie - CC BY-SA 2.0
Curt Alexander (dies 1920), her husband - Public Domain
Contemporary portrait - Public Domain
unknown - CC BY-SA 4.0
Bernard Bevan (?) - CC BY 3.0
Svenska Barnboksinstitutet - CC BY 3.0
Joan Halifax - CC BY 2.0
Thesupermat - CC BY-SA 3.0
David Edwin - Public Domain
unknown; from the collection of F. H. Meserve - Public Domain
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Matsui, Iwane, 1878-1948
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Lenné, Peter Joseph (1789-1866).
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Hirsch, Willard Newman, 1905-1982
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Douglas, Susan J. (Susan Jeanne), 1950-
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NASA - Public Domain
Young, John, 1930-2018
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Sailko - CC BY-SA 3.0
Amigoni, Jacopo, 1682-1752
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Published by "Students' coöperative society" - Public Domain
Pascal, Jean-Louis, 1837-1920
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Government Printing Office - Public Domain
Hasse, Adelaide Rosalia, 1868-1953
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unknown - Public Domain
Clay, C. C. (Clement Claiborne), 1816-1882
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Paget, Muriel, 1876-1938
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Public Domain
Wright, Joseph A. (Joseph Albert), 1810-1867
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Dmitry Scherbie - CC BY-SA 2.0
Spaulding, James
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unknown - Public Domain
Cassel, Paulus, 1821-1892
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Curt Alexander (dies 1920), her husband - Public Domain
Bogan, Louise, 1897-1970
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Contemporary portrait - Public Domain
Barrington, Shute, 1734-1826
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unknown - CC BY-SA 4.0
Kataev, Valentin, 1897-1986
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Thyssen, Fritz, 1873-1951
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Morris, James, 1798-1865
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unknown - Public Domain
Garbisch, Edgar William
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Bernard Bevan (?) - CC BY 3.0
Johnson, Jean B. (Jean Bassett)
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Bergen, Christopher A.
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Svenska Barnboksinstitutet - CC BY 3.0
Tenggren, Gustaf, 1896-1970
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Joan Halifax - CC BY 2.0
Schachter-Shalomi, Zalman, 1924-
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Swinburne, Algernon Charles, 1837-1909
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Thesupermat - CC BY-SA 3.0
Auteuil, Daniel
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Degas, Edgar, 1834-1917
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David Edwin - Public Domain
Allen, William Henry, 1784-1813
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Green, John Richard, 1837-1883
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Lody, Carl Hans
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unknown; from the collection of F. H. Meserve - Public Domain
Potter, John Fox, 1817-1899