On a US website, a cryptogram from the Civil War is introduced. The plaintext is written below it. Can a reader find out if the decryption is correct and what cipher has been used?

A Facebook user has posted a number of scans of a 19th century pocket lexicon with about 80 pages of code in it. Can a reader solve it?

The Museum für Kommunikation in Frankfurt owns a cipher tool from the 19th century. Not much is known about it. Can a reader find out more?

In 1863, during the US Civil War, a Union soldier wrote a letter to an unknown recipient. This letter is encoded in a shorthand, probably Pitman. Can a reader decipher it?