Philosophers

Iamblichus' Life of Pythagoras, or Pythagoric Life

Biography and bibliography of Jesse Walter Fewkes

Haeckel : his life and work

Thomas Paine, the Apostle of Liberty

A Biographical Dictionary of Ancient, Medieval, and Modern Freethinkers

Adam Smith

Steve P. Holcombe, the Converted Gambler: His Life and Work

Two Years and Four Months in a Lunatic Asylum

The Trail of the Tramp

The Life of Hugo Grotius

Letters of Alexander von Humboldt to Varnhagen von Ense

A Discourse on the Life, Character and Writings of Gulian Crommelin Verplanck

Dr. Southwood Smith: A Retrospect

Representative Men: Seven Lectures

Looking Back: An Autobiography

Galileo

Petrarch, the First Modern Scholar and Man of Letters

Comrade Kropotkin

Giordano Bruno

Life of Charles Darwin