FOREWORD 



TTie fossil fields of Wyoming are widely known in this 

 country among the students of paleontology, and their pec.liar 

 value to scienti^s has been established for many years. The 

 general characteristics of this region, its contour and formation, 

 fauna and flora, and the particulars of the different strata found 

 there have been given the public by many men eminent in their 

 profession. Professor Marsh of Yale many years ago recorded 

 the results of his researches, and F. V. Hayden, Clarence King 

 of the U. S. Geological Survey, Arnold Hague, J. J. Stevenson, 

 Marvin and Endlich, and others, have described the country 

 in detail. 



In July, 1899, the passenger department of the Union 

 Pacific Railroad sought to revive interest in the further explora- 

 tion of this ^vonderful field, and to that end invited a number 

 of scientific men to visit that part of Wyoming and make per- 

 sonal investigation of the field. They went as guests of the 

 Union Pacific and were escorted by an official of the company. 



Several of these gentlemen recorded their impressions and 

 experiences, and in some instances embodied in their review a 

 a critical and comprehensive account of their findings which 

 form a valuable contribution to science; and it has been thought 

 proper to make these papers public on account of their intrinsic 

 worth and interest. 



At the time this expedition, or excursion, was made it 

 was given full prominence in elaborate newspaper articles 

 and in magazine reviews, and this seemed then to meet all re- 

 quirements. But, more recently, inquiries have constantly been 

 received asking for fuller and more detailed information if it 

 was attainable, it is to meet this demand that these personal 

 statements by members of the excursion are published. 



Passenger Department 

 UNION PACIFIC RAILROAD, 



Omaha, 1909. 

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