Ad sollemnia natalitia regis augustissimi et potentissimi Friderici Guilelmi IV. celebranda invitant Gymnasii Elberfeldiensis Collegæ - Voelker, Karl Christian Konrad (Typis Sam. Lucas, 1848)
The text is a Latin poem, entitled 'Claudius Civilis in sacro nemore' and signed 'Dr. Völker'