Jacobi’s library was sold to the Prussian state after his death and each individual title was catalogued. Based on this catalogue and an inspection of the books where they are kept today, Konrad Wiedemann {Wiedemann, K.} reconstructed the library and provided the titles with annotations: precise bibliographical descriptions, information on their current locations and notes on their literary treatment. The catalogue provides bibliographical evidence of numerous works for which there would otherwise have been no documentation – some of these even well-known works – and for some unique works as well.