INSTRUCTIONS. 
° 
The following are instructions received, on different occasions, from Dr. 
D. D. Owen, Principal Geologist of the State of Arkansas: 
Instructions, dated October, 1857. 
“ After separating from corps No. 1, you will proceed by the most 
feasible route between Cache and Black rivers, through the north and 
north-west part of Greene, south-east part of Randolph, the eastern part 
of Lawrence, and the north part of Jackson county, and make a general 
geological reconnoissance of those portions of the State of Arkansas. 
You will keep your camp on some main route, and make lateral excur- 
sions to any points of interest between Black river and the eastern branch 
of Cache river. 
Along the line of your route, you will endeavor to see the gentlemen 
whose names are in the list herewith furnished, under the head of the 
counties through which you pass, for the purpose of obtaining information 
in regard to localities considered of special interest, and make a geologi- 
cal exploration of those which may be considered important. 
You will, also, make inquiries in regard to sections "of rocks exposed 
on Black and Cache rivers, and examine the same, in order to obtain a 
clue to the formations of that part of Arkansas. 
I would particularly call your attention to a locality in Randolph county, 
on Mr. McLaires’ land, supposed to contain iron; also, to a locality near 
Pocahontas, in the same county, which is, perhaps, an extension of the 
same bed; also, to deposits of black oxide of manganese, supposed to 
exist in some of the northern counties. 
In your descent of the valleys of Black and Cache rivers, you will 
