In 1855 Deutsch was appointed assistant in the library of the British Museum.
If this supposition be correct, Arno was the first extant writer to apply the name Deutsch (theodisca) to the German language.
There are signs that during Ottos reign they began to have a distinct consciousness of national life, their use of the word deutsch to indicate the whole people being one of these symptoms. Their common sufferings, struggles and triumphs, however, account far more readily for this feeling than the supposition that they were elated by their king undertaking obligations which took him for years together away from his native land.
In the department of belles-lettres he wrote a good deal under such pseudonyms as Christian Deutsch, Gottfried Flammberg and Sigmund Sturm.
