As all good SV-POW! regulars will know, Elmer S. Riggs published the name Brachiosaurus altothorax in a short (but not trival) 1903 paper (Riggs 1903) and followed it up with a proper descriptive monograph (Riggs 1904) that had several useful plates. I’ve never seen a real copy of the latter (or indeed the former), so for the last quarter-century I’ve made do with various low-quality photocopies and scans.