A Dictionary of America... www.gutenberg.org

Lucien henry hi-res stock... www.alamy.com

Joseph Henry | American... www.britannica.com

Ernest Henry (explorer) -... en.wikipedia.org

Dominic Winter Auctioneers... issuu.com

Meunier henri hi-res stock... www.alamy.com

Act v hi-res stock... www.alamy.com

5 july 1890 hi-res stock... www.alamy.com

Patty's Summer Days |... nextory.com

January march 1894 hi-res... www.alamy.com

Henri meunier hi-res stock... www.alamy.com

Meunier henri hi-res stock... www.alamy.com

5 july 1890 hi-res stock... www.alamy.com

Henri meunier hi-res stock... www.alamy.com

Patty's Summer Days |... nextory.com

Henri meunier hi-res stock... www.alamy.com

Joseph Henry Timeline |... siarchives.si.edu

1 october 1821 hi-res stock... www.alamy.com

Joseph Henry Timeline |... siarchives.si.edu

EMILY C. JUDSON (1817 –... www.librarycompany.org