In February 1982, the original orchestral parts of K. 45a (in the handwriting of Leopold, Wolfgang's sister Nannerl and an unknown copyist) were discovered in the Bavarian State Library in Munich.

Only the first page of the last choral prelude BWV 668, the so-called "deathbed chorale", has survived, recorded by an unknown copyist.

Later, another 255 page manuscript first discovered in 1969 after Baba's death and believed to be Baba's words, penned in two 1920s style notebooks by an unknown copyist, were discovered to contain several verbatim pages from the 39 hand-written pages.

Was the charming "Winter Scene in Brooklyn" of 1853 painted by the artist Francis Guy or an unknown copyist?

The three overture movements in Kracher's copy are almost exactly identical with Mozart's autograph, but the minuet differs greatly from the copy of K. 61h by Johann Nepomuk Rainsprechter and an unknown copyist in Salzburg.

The document was written by an unknown copyist.

The document was written by an unknown copyist, although the roughness of the hand suggests that the scribe was a student.