Cappelli hi-res stock photography and images - Alamy
Adriano Cappelli (1859-1942) - Lexicon Abbreviaturarum, J.J. Weber Leipzig, 1902 (page 349 crop) - Manual styles for the character R - PICRYL Public Domain Image
File:Adriano Cappelli (1859-1942) - Lexicon Abbreviaturarum, J.J. Weber Leipzig, 1902 (page 84 crop) - Manual styles for the character B.jpg - Wikimedia Commons
GitHub - CenterForDigitalHumanities/cappelli: Lexicon abbreviaturarum, just the meat.
Mark Thakkar on Twitter: "Cappelli's Lexicon abbreviaturarum is now available in a quickly searchable offline version. You'll need to install a dictionary program like StarDict or GoldenDict, so there's an initial hurdle