accordingly, but endeavors to prove something else. In order to do this, 

 he is willing to write (Amer. Journ. Sci. Arts, 1873, p. 114), "the dates 

 on the papers (Aug. 20th and 22d) certainly do not represent those of 

 actual publication ;" and again (American Naturalist, 1873, p. 151) "no 

 less than seven of Prof. Cope's papers are antedated, as the records of 

 the society will show. ' ' Prof . Marsh is not careful to prevent the natu- 

 ral deduction from these statements, that the dates are fraudulent ; 

 though he well knows to the contrary, and disagreeable though it may be 

 to the mens conscia recti, I am compelled to prove that such is not the 

 case ! 



I therefore append testimonials from the proprietors and foremen of 

 the printing establishment from which the essays in question were issued, 

 and from my assistant who received and distributed them : — 



Philadelphia, March 2ith, 1873. 

 Professor O. C. Marsh having stated in the "American Naturalist" (1873, p. 151) 

 that some of the papers published by Professor Oope during the summer of 1872, and 

 printed by us, bear dates "which do not represent those of publication " and that " at 

 least seven of them are antedated," we hereby state that these dates are true, and that 

 on the days stated from fifty to one hundred copies of these papers were delivered by us 

 into the hands of Pendleton King and Stephen G. Worth, assistants of Professor Cope, 

 except that on Melalophodon, which was issued to Professor Lesley. 



McCALLA & STAVELY. 

 Jno. S. Scheidell, Foreman of Composing Room. 

 John Dardis, Foreman of Press Room. 



Louisiana State University, 



Baton Rouge, March 2ilh, 1873. 

 Professor E. D. Cope, Academy Natural Sciences, Philadelphia : 



Dear Friend : — On looking over my papers, 1 find that I have, among papers writ- 

 ten by you, the following : — 



On a new genus of Pleurodira from the Eocene of Wyoming, July 11, 1872. 



On the Tertiary Coals and Fossils of Osino, Nevada, July 29th. 



Descriptions of some New Vertebrata from the Bridger Group of the Eocene, 

 July 29th. 



Second Account of Same, August 3d» 



Third " " " 7th. 



On the Existence of Dinosauria in the Transition Beds of Wyoming. 



Short notice of Species of Loxolophodon (misprinted Lefalophodon), Cope, near 

 August 17th. 



Notices of New Vertebrata from the Upper Waters of Bitter Creek, Wyoming Ter- 

 ritory, August 20th. 



Second Notice of Extinct Vertebrates from Bitter Creek, Wyoming, August 22, 1872. 



These I brought with me from Philadelphia, leaving early in September, 1872. 



I laid them aside during July and August, and am confident that the dates which I 

 find on them, as above, correspond with the times I received them from the printer. 



Your instructions were for immediate distribution, which 1 followed, using the list 

 of names of persons to whom they were to be sent. Some received them very soon, 

 others after a short delay, as suited convenience in mailing; and I think all were mailed 

 by the 1st of September. 



You are at liberty to use this letter if desirable. Very truly, 



PENDLETON KING, 

 Professor of Natural History in the University of Louisiana. 



