Life of Upper Lake Region. 145 



From this same locality the writer, many 

 years ago, made a collection of fossil plants 

 which passed into the hands of Dr. Newbury. 

 In this collection was a specimen of birch and 

 a beautiful branch of acacia, the leaflets all 

 finely outlined upon the gray sandstone and 

 the branch carrying three or four large thorns 

 so distinctly impressed on the rock as to give 

 a vivid impression of its place in plant life. 

 Besides these, there was an intensely interest- 

 ing group of oak leaves indicating a range of 

 four or five different species, the whole collec- 

 tion leaving on the mind a conviction of a 

 cold, unfriendly climate, producing a stunted 

 growth of leaves. 



THE SILVER LAKE GROUP. 



In 1876, Governor Whiteaker while 

 camping in Eastern Oregon in the' neighbor- 

 hood of Silver lake, noticed some fossil bones 

 on the surface of the open prairie and shortly 

 after this brought some fragments to the 

 writer of these pages for examination. The 

 Governor was soon convinced that he had dis- 



