AT. 21.] TO JOHN TORREY. 37 
thus far, been so useful to me, and I shall always wish 
to do all in my power to render it interesting to you. 
I shall be ready to leave this place by Ist of Septem- 
ber next, at which time I shall probably visit New 
York. Will you write me on this subject as soon as 
convenient, and very much oblige, 
Yours truly, A. Gray. 
P.S. There is within a circuit of some miles, and 
at this place, a great variety of fossil organic remains, 
and I am collecting them as extensively as possible. 
We find trilobites (Asaphus, and occasionally Caly- 
mene), a variety of bivalve and a few univalve shells, 
ete., both in lime rock and greywacke. e cele- 
brated locality of Trenton Falls you are of course 
acquainted with. Would a suit of them be accepta- 
ble to yourself, or the Lyceum of Natural History, 
New York? And can they be named, so that I can 
label my collection from them? There may few of 
them be of any interest, but if you wish it you shall 
have a suit containing specimens of all I find. 
Unica, January 2, 1835. 
I received your letter of December 25, and have 
given the subject of which you write a careful con- 
sideration. I may say that I have no objection to the 
situation you propose, if a proper arrangement can be 
made. 
The terms of my engagement here are these. This 
situation became vacant by the death of Mr. Edgerton 
in April last. Iwas recommended by some of my 
friends, and finally made an arrangement for one year; 
took charge of a class in botany and mineralogy on 
20th May; closed July 30. Have been at liberty 
