188 PROCEEDINGS OP THE AMERICAN ACADEMY 



" I beg to state that the limestone at the top of the fall at Mont- 

 morency is Trenton limestone, and full of fossils. 1 have collected a 

 good many there myself. I did not examine the rocks at the foot of 

 the fall, as I had no idea when I was there that any question as to its 



age would ever arise. ,, ,^ ,> ,, 



'= *'L. Billings." 



" Raleigh, December 28 or 29, 1860. 

 [Postal mark, December 29.] 

 " Prof. J. Marcou. 



"My dear Sir, — I thank you for your pnmphlets, and am ex- 

 ceedingly gratified with the view you have taken of the question. It 

 is presented in an unanswerable form. I have dwelt more ujion the 

 stratigraj)liical relations of the two systems ; because, to ordinary 

 readers, that is perfectly obvious. I insisted, however, upon the pa- 

 laeontological view, the palaeontological evidence ; and said often, that, 

 if this was rejected, then ought all of this kind of evidence to be re- 

 jected elsewhere. INIr. J. Hall insisted upon the identity of the Atops 

 and Trldi-thriis ; notwithstanding the decision years ago by a commit- 

 tee of the American Association, of whom {sic~\ Conrad was a member, 

 was against Hall. 



" I made and published with my Report while in the survey of New 

 York a modified map of the State, which showed the extent of the 

 Taconic rocks in New York. The three thousand copies were stolen 

 or destroyed by persons unknowp, so that they were never issued 

 with the proper volume. The rocks illustrating the Taconic system 



in the State Cabinet were all taken out by order My existence 



as one of the State geologists was ignored at the last meeting of the 

 American Association at Albany. In fine, the persecution I suflTered 

 for opinion has been rarely equalled The editor of the Amer- 

 ican Journal of Science refused to publish my remarks upon Logan's 

 Report, when he announced his Iluronian system ; though they were 

 courteous in the extreme. I claimed that the Haronian was only the 



Taconic system Are you aware that most, if not all, of those 



beautiful Graptolites Mr. Hall refers to the Hudson River group 

 belong to the Taconic system ? Nothing of the kind occurs in the 

 Lorrain slates, or the shales about Rome, where the rocks are undis- 

 turbed ; there are probably two species in the Trenton and the slates 

 above. No more. 



" I shall be very much obliged to you for six more copies of your 

 paper. 



" E. Emmons. 



