Triassic Flora of Richmond. — Marcou. * 165 
for the Trias and Dyas of Russia, confounded and placed into 
a single system, under the name Permian, Emmons, at p. 159, 
{loc. cit.) inclines to adopt the view that "the coals of Deep and 
Dan rivers are Permian.-' 
I was not aware of the existence of that report until I860,' 
when Dr. Emmons wrote me from Raleigh in November : "I 
sent the other day my report for 1852, which is so shabby that 
I hated to send it to decent men," on account of bad printing. 
I took advantage of my stay in Ziirich to submit to my 
friend and colleague at the federal Polytechnic School, Oswald 
Heer, some of my specimens of fossil plants from Richmond 
and asked his opinion. Heer studied carefully a few — only 
three — of my specimens, and all the plates published by W.B. 
Rogers, Bunbury and Emmons ; and his conclusions were 
that the coal flora of Richmond is contemporaneous with the 
flora of the Keuper of Wiirtemberg, Switzerland and Bavaria, 
agreeing entirely with my view published twice before in 1854 
and 1855 at Washington and in Paris. Heer wrote me an 
open letter on the subject, dated Ziirich, July 25th, 1857, which 
I have published in my Geology of North America, at p. 16, 
4to, Ziirich, 1858. Dr. Emmons, having asked me as a favor 
to send him a copy of that letter — before the issue of my book 
then already going through the press — I complied with his 
request, and he communicated it to his old friend and prede- 
cessor at Williams college, professor C. Dewey. Without ask- 
ing my permission Dewey arranged with Mr. James D. Dana, 
a publication of that letter, using at the same time my own 
letter to Emmons, and the whole appeared in the "Amer. 
Jour. Sci." vol XXIV, p. 428, 1857, under the initials C. D., with 
Additional remarks hy J. D. Dana. My name is struck out 
from the letter of Heer, addressed to me, and instead it is said 
that Heer examined professor Emmons' specimens from 
North Carolina and forwarded his conclusions to him, two 
errors absolutely inexcusable, for Messrs. Dewey and Dana 
had in their hands, first, my letter to Emmons, from which 
they made quotations, and second, the copy of the letter from 
Heer to me, with my address on it. 
Dr. Emmons wrote me, Oct. 24, 1857, from Raleigh : "I 
have been extremely gratified at what has ultimately taken 
place (in regard to Lyell accepting the age of the Richmond 
coal field as Keuper), and which yourself and professor Heer 
