Deafness in Disguise: Concealed Hearing Devices of the 19th and 20th Centuries
Exhibit, gallery and explanations of 19th century hearing aids
Shining Tree of Life : The New Yorker
Article about the Shakers
The Emancipator
The Emancipator Newsletter, published monthly in Jonesborough, Tennessee in 1820 by Elihu Embree, advocated the abolition of slavery.