Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

Bulletin of the Museum of Comparative Zoology at Harvard College / NOAA.

Courtesy of the NYPL Digital Gallery
(image use requires permission from the New York Public Library)

C. Turner (engraver) / Frederick Cruickshank (painter)

Print by Van Somer included in "The Moral and Historical Works of Lord Bacon", edited by John Devey, M.A., Henry G. Bohn, York Street, Covent Garden, 1852.

Walter Bagehot (1826-1877)

Courtesy of the NYPL Digital Gallery
(image use requires permission from the New York Public Library)

From McClure's Magazine, December 1895 (Project Gutenberg)

H. B. Hall, Jr.

Sir John Barrow (the Mutiny on the Bounty author, not the physicist)

Congressional photo

Frontispiece Portrait from Lorna Doone, 1900 edition.

Credit: Bachrach, Newton, Mass.
Courtesy of the NYPL Digital Gallery
(image use requires permission from the New York Public Library)

Source: "Portrait Gallery of Eminent Men and Women
in Europe and America," by Evert A. Duyckinick
(New York, 1873)
(colored by Jan Arkesteijn)

Public domain (Wikipedia)

Photo circa 1855-1865
(Brady-Handy Photograph Collection,
LoC Prints and Photographs Division,
LC-DIG-cwpbh-02728)

Davis & Sanford (1904)

Courtesy of the NYPL Digital Gallery
(image use requires permission from the New York Public Library)

From Wikimedia Commons

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

1902 photograph (LoC Prints and Photographs, LC-USZC2-6269)

Alexander Campbell (clergyman) at Age 65. Frontispiece from Richardson, Robert. Memoirs of Alexander Campbell, vol.1, Lippincott, 1869.

Source: "Great Britain and Her Queen,"
by Anne E. Keeling (1897)
(Project Gutenberg)

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

Source: "Indians of the Yosemite Valley and Vicinity", 1907
(Project Gutenberg)

Photo by Jim Bradbury / Flickr.

Source: "Little journeys to the homes of the great",
by Elbert Hubbard, v. 5 (New York : 1916)
(Project Gutenberg)

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

c1913, Library of Congress

Ruthven Deane Collection, LoC Prints and Photographs (LC-USZ62-70911)

public domain - http://en.wikipedia.org/wiki/Image:Cowper_w.jpg

Image © ÖNB/Wien

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

Lithograph - Karl Klietsch / Photo © ÖNB/Wien

Image © ÖNB/Wien

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

The Story of the Hymns and Tunes, Theron Brown and Hezekaiah Butterworth

Henry Van Dyke and wife: Library of Congress Prints and Photographs Division, George Grantham Bain Collection (REPRODUCTION NUMBER: LC-DIG-ggbain-17998)

Source: "Little Journeys To the Homes of
Good Men and Great" by Elbert Hubbard (1916)
(Project Gutenberg)

George Grantham Bain Collection,
LoC Prints and Photographs Division,
LC-DIG-ggbain-00573

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

Brady-Handy Photograph Collection, LoC Prints and Photographs (LC-DIG-cwpbh-01649)

Wikipedia

Wikipédia France

From Wikimedia Commons

Major-General U.S. Grant, etching from a photograph probably taken in 1863.

Bentley Historical Library, University of Michigan

Cigarette card (courtesy of the NYPL Digital Gallery; image use requires permission from the New York Public Library)

George Grantham Bain Collection (Library of Congress)

Photograph, circa 1890 (Ruthven Deane Collection, LoC Prints and Photographs, LC-USZ62-73593)

Courtesy of the NYPL Digital Gallery
(image use requires permission from the New York Public Library)

from Wikipedia

Library of Congress Prints and Photographs Division (REPRODUCTION NUMBER: LC-USZ62-56058) (cropped)

Library of Congress Prints and Photographs Division, Brady-Handy Photograph Collection (REPRODUCTION NUMBER: LC-DIG-cwpbh-00491) (cropped)

Sven Anders Hedin (1865-1952)
(George Grantham Bain Collection,
LoC Prints and Photographs Division,
LC-DIG-ggbain-17306)

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

Engraving by Robert White (1674)

Edward Hitchcock (1793-1864)
Courtesy of the NYPL Digital Gallery
(image use requires permission from the New York Public Library)

from Wikipedia
Photograph taken of the bust of Homer
in the British Museum, London

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

Thomas Hughes (1822–1896)
engraving (ca. 1860-1890)
(Library of Congress Prints and Photographs Division)

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

"Professor Huxley. F.R.S."
Courtesy of the NYPL Digital Gallery
(image use requires permission from the New York Public Library)

From "Lives of Girls Who Became Famous," Sarah Bolton, 1914 Project Gutenberg

Perry-Castañeda Collection, University of Texas at Austin

Courtesy of the NYPL Digital Gallery
(image use requires permission from the New York Public Library)

Wikipedia

Library of Congress Prints and Photographs Division (REPRODUCTION NUMBER: LC-USZ61-1494) (cropped)

wikipedia - Ben Jonson by Abraham Blyenberch, circa 1617.

Library of Congress Prints and Photographs Division, Harris & Ewing Collection (REPRODUCTION NUMBER: LC-DIG-hec-09391)

wikipedia

Source: "Literary hearthstones of Dixie,"
by La Salle Corbell Pickett (Philadelphia, 1912)
(Project Gutenberg)

Image from Memoir of Joseph Leidy, M. D., LL. D. (1891) by Henry C. Chapman

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

from Wikipedia

John Gibson Lockhart. Frontispiece from The life and letters of John Gibson Lockhart (1897) by Andrew Lang

Source: "The world's best poetry," v. 3
(Philadelphia, 1904)
(Project Gutenberg)

Library of Congress Prints and Photographs Division (REPRODUCTION NUMBER: LC-USZ62-137698)

Photographer unknown. From the Smithsonian Institution, Dibner Library of the History of Science and Technology.

1897 photograph (LoC Prints and Photographs, LC-USZ62-95549)

Photo © ÖNB/Wien

E. Goldensky (photographer) / G. H. Goudiss

Photoprint copyrighted by A.F. Bradley, 1907 (Library of Congress Prints and Photographs Division, Reproduction number: LC-USZ61-209)

Anonymous artist, held at Corpus Christi College, Cambridge

Public domain

1901 photograph (Ruthven Deane Collection, LoC Prints and Photographs, LC-USZ62-98680)

(Portrait of en:Frederick Brotherton Meyer (1847-1929), British Baptist pastor and evangelist, taken from a 1899 Swedish Christmas magazine, http://runeberg.org/julfrid/1899/0015.html {{PD-old}})

Courtesy of the NYPL Digital Gallery
(image use requires permission from the New York Public Library)

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

Olive Thorne Miller (b.1831), Buffalo Electrotype and Engraving Co., Buffalo, N.Y.

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

Thomas Moore (1779-1852) / Photo © ÖNB/Wien

From "Farthest North" by Nansen

Copyrighted by J.E. Purdy, 1903
(LoC Prints and Photographs Division,
LC-USZ62-63651)

Library of Congress Prints and Photographs Division (REPRODUCTION NUMBER: LC-USZ62-56058) (cropped)

See below.

Credit: Pirie MacDonald, 1914
(LoC Prints and Photographs Division,
LC-USZ62-105818)

Library of Congress Prints and Photographs Division, Reproduction Number LC-USZ61-97

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

Gifford Bryce Pinchot (1865-1946)
(George Grantham Bain Collection,
LoC Prints and Photographs Division,
LC-DIG-ggbain-04976)

Jean-Baptiste van Loo (1684-1745)

William Hickling Prescott (1796-1859) (Brady-Handy Photographs, Library of Congress Prints and Photographs Division, Reproduction Number: LC-DIG-cwpbh-03537) (cropped)

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

From Wikipedia

Courtesy of the NYPL Digital Gallery
(image use requires permission from the New York Public Library)

From the Collections of the U.S. National Library of Medicine, Bethesda, MD.

Source: "Little Journeys To the Homes of
Good Men and Great" by Elbert Hubbard (1916)
(Project Gutenberg)

1904 photograph (LoC Prints and Photographs Division, LC-USZ62-103958)

From Wikimedia Commons

From "The Modern Scottish Minstrel, Volume I. The Songs of Scotland of the past half century"
(Project Gutenberg)

William H. Seward, U.S. Secretary of State, etching from a daguerreotype from about 1861.

Wikipedia

Wikipedia Image

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

Benjamin Silliman (1779-1864) Reproduction of oil portrait by Daniel Huntington in the Yale Art Gallery, 1857 (Silliman Family Papers. Manuscripts & Archives, Yale University Library)

1903 photograph (LoC Prints and Photographs, LC-USZ62-98127)

Herbert Spencer, 1820-1903

c. 1885

from Wikipedia

Photo by Alvin Langdon Coburn. Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

wikipedia

Photo by Napoleon Sarony
Courtesy of the NYPL Digital Gallery
(image use requires permission from the New York Public Library)

Perry-Castañeda Library, University of Texas at Austin

Poems, 1917

Copyrighted by Geo. F. Parlow, 1879
(LoC Prints and Photographs Division,
LC-USZ61-361)

Courtesy of the NYPL Digital Gallery
(image use requires permission from the New York Public Library)

Cropped from "I want you for the U.S. Army nearest recruiting station" by James Montgomery Flagg. Wikimedia Commons.

Wikipedia: "Publius Vergilius Maro" Description: Bust of Vergil Date: April, 2005 Author: A. Hunter Wright

from Wikipedia

Photo by George Gardner Rockwood
Courtesy of the NYPL Digital Gallery
(image use requires permission from the New York Public Library)

Francis Wayland. From A Memoir of the Life and Labors of Francis Wayland D.D., LL. D. Late President of Brown University by Francis Wayland and H.L. Wayland; New York; Sheldon and Company; 1867. Wikimedia Commons.

1904 photograph (LoC Prints and Photographs, LC-USZ62-93461)

This image was made in 1887 in New York, by photographer George C. Cox (Wikipedia)

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

Courtesy of the NYPL Digital Gallery (image use requires permission from the New York Public Library)

Portrait by Benjamin Robert Haydon, 1842
(Yorck Project)

Fanny Bullock Workman standing on Silver Throne plateau, Karakoram, Kashmir, Asia: Library of Congress Prints and Photographs Division (REPRODUCTION NUMBER: LC-USZ62-108071)