Analysis of information sources in references of the Wikipedia article "Copyright" in English language version.
Sigismund Hermbstädt, for example, a chemistry and pharmacy professor in Berlin, who has long since disappeared into the oblivion of history, earned more royalties for his "Principles of Leather Tanning" published in 1806 than British author Mary Shelley did for her horror novel "Frankenstein," which is still famous today.