It was an important find scientifically. The position of the limbs gave clear evidence of the manner in which these animals carried themselves. The articulation between the thigh bone and the pelvis showed conclusively that sauropods walked with their legs more-or-less vertical to the body and not with the bowed-out crawling posture habitual to lizards, as many scientists had supposed. The skull was the finest known for this genus. It was complete even to the sclerotic ring—a complex of bony plates which surrounded the living eye and protected it. As exhibit material it was without rival. It was mounted as found, lying on its side, the bones fixed in death in the matrix in which they had been preserved—a fitting climax to the 13 consecutive years that had seen an unknown sandstone ridge in Utah become Dinosaur National Monument. In those 13 years the Carnegie Museum had taken from the quarry parts of 300 dinosaur specimens, 2 dozen of which were mountable skeletons. Ten different species were represented. It was the best collection of Middle Mesozoic monsters in the world. In the years that immediately followed, the still-rich “dig” was worked by two other organizations—the Smithsonian Institution and the University of Utah. [Illustration: _Camarasaurus_ SKELETON—THE MOST PERFECT REMOVED FROM THE QUARRY. (COURTESY, CARNEGIE MUSEUM.)] But finally the museums had reaped their harvest. The fruits of the harvest had gone to enrich many of their finest displays. However, still buried in the untouched part of the wall were the remains of still more dinosaurs. All that was needed was to reveal them. The 67° tilt of the rock made it a perfect exhibit face. Strip off the overlying layers, expose the skeletons, and relief them in place. This had been Douglass’s idea as far back as 1915, when he recorded it in his diary. PROTECTING THE QUARRY But Douglass was not the only one to realize the necessity of preserving this unique fossil record of the dinosaurs for people of today and the future to see on the spot. Officials of the Carnegie Museum realized the extraordinary nature of the deposits and their contribution to our knowledge of the past; and they were not long in taking steps to protect the dinosaur quarry. To preserve it for science, they sought to lay claim to it as a mineral property. But their claim was disallowed by the U. S. Department of the Interior, because fossil bones could not be classed as a mineral within the meaning of the mining laws.