viii Acknowledgements 



were sent to me by my old friend, Dr. Osborn, 

 President of the American Museum of Natural 

 History, New York. The picture of a Portheus, 

 from the London Illustrated News, the Figure 

 of a Tylosaur by my son George F. Sternberg. 

 The restoration of Diplodocus carnegie by Mr. C. 

 W. Gilmore of the U. S. National Museum, and 

 the figures 43, 44, and 45 taken last year by my 

 son Levi) belong to the Survey. Mr. Clark in 

 charge of the Division of Photography developed 

 the photographs, and the Terre Haute Engraving 

 Co. made the halftones. Neither can I forget the 

 unvarying kindness of the former Deputy Min- 

 ister, Dr. R. W. Brock who first employed me. 

 For the great assistance he rendered me in field 

 and shop. For his earnest assistance to help me 

 build up a great collection of the Extinct Ani- 

 mals of Canada, at the Victoria Memorial Muse- 

 um at Ottawa, Ontario. I hope these gentlemen 

 and all others who have helped me to that end, 

 will feel themselves included in this letter of 

 thanks. 



Faithfully yours, 

 CHARLES H. STERNBERG. 



