After the turn of the 20th century, Pittsburgh's Carnegie Museum of Natural History sent fossil hunter Earl Douglass to Utah to excavate the Carnegie Quarry in the area now known as Dinosaur National Monument. Four neck vertebrae, each 1 meter (3 feet) long, were collected in 1912 near a specimen of "Diplodocus", but a few years later, William Jacob Holland realized they belonged to a different species. Meanwhile, the type specimen of "Barosaurus" had finally been prepared at Yale in the winter of 1917 and was fully described by Richard Swann Lull in 1919. Based on Lull's description, Holland referred the vertebrae (CM 1198), along with a second partial skeleton found by Douglass in 1918 (CM 11984), to "Barosaurus". This second Carnegie specimen remains in the rock wall at Dinosaur National Monument and was not fully prepared until the 1980s.