"The Adventure of the Unique Dickensians" is a detective fiction short story by American writer August Derleth.

Of the Mycroft and Moran edition, 35 copies were bound in black cloth printed in gilt on the spine and front board, likely by collector/publisher Gerry de la Ree and distributed thus probably during the 1980s.

The story is part of Derleth's Solar Pons series of pastiches of the Sherlock Holmes tales of Arthur Conan Doyle.

It is a Christmas story about Ebenezer Snawley, an eccentric collector of Dickensiana who dresses in 19th-century clothing and is harassed by a man who bawls street cries near his dwelling.

The story was eventually collected in The Chronicles of Solar Pons.