Plotinus —
Photo Credit: By Anonymous - Ostiense Museum, Ostia Antica - ROME, Italy, Public Domain, https://commons.wikimedia.org/w/index.php?curid=1659353

Heraclitus — cropped
Photo Credit: By Johannes Moreelse - Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=14929547

Beelzebub's Tales to His Grandson —
Photo Credit:

The body of Gurdjieff, lying in state, France —
Photo Credit: By Janet Flanner-Solita Solano papers - http://popartmachine.com/item/pop_art/LOC+1144686/, Public Domain, https://commons.wikimedia.org/w/index.php?curid=8026196

Georges Gurdjieff —
Photo Credit: By Janet Flanner-Solita Solano papers. - https://www.loc.gov/pictures/item/95507085/, Public Domain, https://commons.wikimedia.org/w/index.php?curid=8026263

Blavatsky's birthplace — Illustration of Yekaterinoslav, Russia Empire— now Dnipro, Ukraine—as it appeared in the early 19th century
Photo Credit: By Unknown - [1], Public Domain, https://commons.wikimedia.org/w/index.php?curid=8695071

HP Blavatsky —
Photo Credit: By Unsure - http://www.blavatskyarchives.com/hpbphotos6.htm, Public Domain, https://commons.wikimedia.org/w/index.php?curid=66334

Polk Inauguration — as shown in the Illustrated London News, v. 6, April 19, 1845
Photo Credit: By Illustrated London News, v. 6 - From the Library of Congress, Public Domain, https://commons.wikimedia.org/w/index.php?curid=46622310

James Knox Polk — Polk's official White House portrait, by George Peter Alexander Healy, 1858
Photo Credit: By George Peter Alexander Healy - The White House Historical Association, Public Domain, https://commons.wikimedia.org/w/index.php?curid=10288056

Tyler's birthplace — Greenway Plantation, Charles City County, VA
Photo Credit: By Unknown - http://memory.loc.gov/pnp/habshaer/va/va0300/va0309/photos/160346pv.jpg, Public Domain, https://commons.wikimedia.org/w/index.php?curid=12310192

John Tyler —
Photo Credit: By The Bureau of Engraving and Printing - Restoration by Godot13, Public Domain, https://commons.wikimedia.org/w/index.php?curid=33963339