The Adventure of the Mysterious Piano
From The Arthur Conan Doyle Encyclopedia
The Adventure of the Mysterious Piano is a comic strip of the Sherlocko the Monk series drawn by Gus Mager, published in Hearst's syndicated press from 12 may 1912.

The Adventure of the Mysterious Piano is a comic strip of the Sherlocko the Monk series drawn by Gus Mager, published in Hearst's syndicated press from 12 may 1912.