John Adams — c. 1800/1815, oil on canvas
Photo Credit: By Gilbert Stuart - National Gallery of Art, Washington, Public Domain, https://commons.wikimedia.org/w/index.php?curid=52673612

George Washington — cropped
Photo Credit: By Gilbert Stuart - http://www.clarkart.edu/Collection/7577, Public Domain, https://commons.wikimedia.org/w/index.php?curid=591229

Underneath Niagara Falls — by Richardt at the Met, 1862
Photo Credit: By Metropolitan Museum of Art - http://images.metmuseum.org/CRDImages/ap/web-large/APS6828.jpg, CC0, https://commons.wikimedia.org/w/index.php?curid=56190025

Niagara Falls (circa 1832) — Niagara Fälle. Les chûtes du Niagara. By Karl Bodmer - http://www.gallery.oldbookart.com/main.php?g2_itemId=30172, from the book "Maximilian, Prince of Wied’s Travels in the Interior of North America, during the years 1832–1834"
Photo Credit: Publisher: Ackermann & Co., 1839, Public Domain, https://commons.wikimedia.org/w/index.php?curid=38943436

Niagara — 1857 painting
Photo Credit: By Frederic Edwin Church - Web Gallery of Art: Image Info about artworkThe Bridgeman Art Library, Object 445386#National Gallery of Art, Washington, D. C., online collection, Public Domain, https://commons.wikimedia.org/w/index.php?curid=15452398

The assassination of William Morgan — As imagined and engraved by artist Pierre Méjanel in1886
Photo Credit: By Gravure dessinée par Pierre Méjanel et gravée par François Pannemaker. - Léo Taxil, Les Mystères de la Franc-Maçonnerie, Paris, 1886., Public Domain, https://commons.wikimedia.org/w/index.php?curid=33281486

Cover of Morgan's Anti-Fremasonry Book —
Photo Credit:

William Morgan — cropped
Photo Credit: By A. Cooley - The Grand Lodge of British Columbia and Yukon: William Morgan notes: here, Public Domain, https://commons.wikimedia.org/w/index.php?curid=16730969

Cabral's Tomb — In the São João Evangelista chapel of the Convento da Graça in Santarém
Photo Credit: By Carlos Luis M C da Cruz - Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=4570856

Cabral Lands in Brazil — Painting of Cabral's first landing on what he called the Island of the True Cross; modern day Brazil.
Photo Credit: By Oscar Pereira da Silva - Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=10804817

Cabral Sights Brazil — Cabral points at the Brazilian mainland on 22 April 1500
Photo Credit: By Aurélio de Figueiredo - Revista de História da Biblioteca Nacional (Issue 55), April 2010, Public Domain, https://commons.wikimedia.org/w/index.php?curid=11224829