December 16, 1921



Dr. W.J. Holland,

Carnegie Museum,

Pittburgh, Pa.



Dear Doctor Holland:



I would like to use in an article on popular geology an illustration of Diplodocus and also one of Aptosaurus.  Can the Museum furnish prints of these, as the American Museum does of its illustrations, which may be rephotographed and added to the official record of the Geological Survey for use as desired?  If so, please state form of credit which should be used.  I am authorized by the editor of the National Parks Service to make this request in the name of that service also.  The present need is for illustrations of the material, as restored, of the Dinosaur National Monu