The personal papers include lyrical and dramatic poetry in various versions, historical-scientific studies, numerous translations, extensive correspondence and a diary kept over many years.
The register of personal papers can be found at:
http://daten.digitale-sammlungen.de/bsb00076324/image_1
Nächtlich am Busento lispeln, bei Cosenza, dumpfe Lieder,
Aus den Wassern schallt es Antwort, und in Wirbeln klingt es wider!
Und den Fluß hinauf, hinunter, ziehn die Schatten tapfrer Goten,
Die den Alarich beweinen, ihres Volkes besten Toten.
"The grave in the Busento" (1820) is considered one of the most widely known lays of German literature. You are now welcome to browse various versions of the poem in Platen's own handwriting.
http://daten.digitale-sammlungen.de/bsb00106072/image_90
http://daten.digitale-sammlungen.de/bsb00106077/image_55