RR Auction: Fine Autographs and Artifacts Featuring The Founding Fathers

TLS signed “A. Einstein,” one page both sides, 8.5 x 11, embossed personal letterhead, January 14, 1954. Letter to Walter Stern, in full: "I ag...

English Victorian statistician, progressive, polymath, sociologist, psychologist, anthropologist, eugenicist, tropical explorer, geographer, inventor,

German medical scientist (1843–1910) regarded as the father of bacteriology. He isolated the tuberculosis bacillus and the anthrax virus, and received

ALS in German, signed “Planck,” four pages on two adjoining sheets, 4.5 x 7, September 23, 1925. Significant letter to physicist Wilhelm Wien, about t

Nobel Prize-winning German physicist (1858–1947) who pioneered the understanding of quantum theory. ALS in German, signed “M. Planck,” one page, 5 x 4

American medical researcher (1906–1993) best known for developing a practical oral polio vaccine. AMS, signed on a title sheet, "Albert B. Sabi...

German philosopher and cultural critic (1892–1940) who made enduring and influential contributions to aesthetic theory and Western Marxism. Substantia

Romanian philosopher and essayist (1911–1995) who was awarded the prestigious Rivarol Prize in 1950 for his first French book, A Short History of Deca

ALS in German, signed “Freud,” one page, 5.5 x 3.5, no date but postmarked June 8, 1938. Letter to Oscar Philipp in London, in full (translated): &q...

Influential German philosopher (1770-1831) who espoused a dialectical method by which an idea (thesis) was challenged by its opposite (antithesis) and