Moses Billings
With the development of the daguerreotype in the 1840s, the role of the portrait painter declined in general, because it was now much easier and much cheaper to have one's likeness presented in a visual format. While many portrait painters lost business in competition with the daguerreotype, Billings instead began to produce daguerreotype prints himself. It is not known exactly which prints were made by Moses Billings, as daguerreotypes were usually signed, when signed at all, along the side of the plate. Due to the traditional storing methods of daguerreotype plates, even this signature usually quickly became illegible. However, it has been generally noted, or at least hypothesized, that his daguerreotype prints showed a level of talent and artistry above that of amateur daguerreotypists. Though it is not known exactly which prints were his, it is known that he had largely abandoned the process by the 1850s. Even after he stopped making daguerreotypes, he did continue to paint people's portraits on canvas.
Daspletosaurus
The type specimen of "Daspletosaurus torosus" (CMN 8506) is a partial skeleton including the skull, the shoulder, a forelimb, the pelvis, a femur and all of the vertebrae from the neck, torso and hip, as well as the first eleven tail vertebrae. It was discovered in 1921 near Steveville, Alberta, by Charles Mortram Sternberg, who thought it was a new species of "Gorgosaurus". It was not until 1970 that the specimen was fully described by Dale Russell, who made it the type of a new genus, "Daspletosaurus", from the Greek δασπλής ("dasplēs", stem and connective vowel resulting in "dasplēto"~) ("frightful") and "σαυρος/sauros" ("lizard"). The type species is "Daspletosaurus torosus", the specific name "torosus" being Latin for 'muscular' or 'brawny'. Aside from the type, there is only one other well-known specimen, RTMP 2001.36.1, a relatively complete skeleton discovered in 2001. Both specimens were recovered from the Oldman Formation in the Judith River Group of Alberta. The Oldman Formation was deposited during the middle Campanian stage of the Late Cretaceous, from about 77 to 76 Ma (million years ago). A specimen from the younger Horseshoe Canyon Formation in Alberta has been reassigned to "Albertosaurus sarcophagus". Another specimen from the Horseshoe Canyon Formation may be referrable to "Daspletosaurus", but this has not been confirmed or rejected yet.