134 The American Geologist. March, 1905 
be his lot to study. After Marsh's death the uncompleted 
Ceratopsia volume was assigned to Hatcher by the U. S. 
Geological Survey. This gave him much gratification, for 
he was thus enabled to associate his name, not only as a 
collector, but also as a student, with these great and curious 
beasts, all of which he had discovered and taken up. In 
this work again was shown his unbounded enthusiasm and 
strenuosity, as nearly all the liberal financial allotment from 
the U. S. Geological Survey was spent by him on pre- 
parators, draughtsmen, and clerks. Not more than a few 
hundred dollars remained for his own services, but at any 
cost the volume must be completed by July i, 1904, and this 
would have been accomplished had not sickness overtaken 
him. However, it is a source of great satisfaction to his 
friends that he left the manuscript and drawings for this 
large volume nearly finished. 
Of his unequaled ability in the field, Scott has said : 
"Hatcher had a positive genius for that particular kind of 
work. * * * ]\Iarvelous powers of vision, at once tele- 
scopic and microscopic, a dauntless energy and fertility of 
resource that laughed all obstacles to scorn. * * * He 
may be said to have fairly revolutionized the methods of 
collecting vertebrate fossils, a work which before his time 
had been almost wholly in the hands of untrained and 
unskilled men, but which he converted into a fine art." 
In the spring of 1893 Hatcher accepted a call to Prince- 
ton University as curator of vertebrate paleontology and 
assistant in geology. Of his career at Princeton Scott has 
stated : He "at once threw himself into his new duties with 
characteristic ardor. For the three summers of 1893-5 he 
conducted field-parties of students through large parts of 
Utah, Wyoming and South Dakota and, with all of his 
old interest and skill, gathered priceless collections of 
mammals from the Uinta, White River, Loup Fork and 
Sheridan beds, accomplishing wonders, in spite of scanty 
resources which sadly hampered his plans. His students 
became his enthusiastic friends and admirers, glorying in 
the courage and devotion which overcame every obstacle, 
material or moral. In return. Hatcher took the warmest 
interest in his students, especially in those who were 
