416 SUPPLEMENTARY INVESTIGATIONS IN THE GRAVEL REGION. 
the mountain. The pay-stratum is about eight feet thick ; it is made up of quartz which is very 
little worn, and it carries gold which is not much abraded. There is also some hard sand inter- 
mixed with quartz. The course of this channel is given as a little south of west. 
Section V.— Zhe Gravel Deposits between Indiana Hill (near Gold Run) and 
Quaker Hill. 
Following the order which I at first proposed, I should have to defer to the last any considera- 
tion of the Gold Run, Dutch Flat, and You Bet gravels, but it seems best now to bring the matter 
in at this point, and thus complete all that I have to say about the gravels of Nevada County 
before passing to the more northern counties. 
I postponed my trip to this region until after the other districts assigned to me had been visited, 
because I was already familiar, from my work in 1870 and 1871, with its main features. I reached 
Dutch Flat on the evening of the 15th of November, and left there for San Francisco on the 23d. 
During the week I reviewed the most of the ground from Indiana Hill to Quaker Hill that I had 
gone over in the former exploration, and spent as much time as possible at points where there was 
reason to expect new features of interest.* 
The extracts from my former report, given on pages 143 to 181 of this volume, I am willing to 
let stand without essential alteration.t The statements there made are substantially correct, or 
were so at the time of writing, and no new light has been thrown upon the subject by subsequent 
mining operations which will require me to modify my former opinions, unless it be in regard to 
some points near Quaker Hill. 
The principal changes which have been brought about in the last nine years in this vicinity 
are : — 
(1.) The uncovering of deep bed-rock at the Indiana Hill and Cedar claims, near the southern 
end of the district ; 
(2.) The extension of the washings between the railroad and Dutch Flat Cafion, so as to show 
more bed-rock than formerly, particularly in or near the Jehoshaphat claim ; 
(3.) The removal of gravel to deep bed-rock at two claims on Dutch Flat (Gray’s) Hill, the 
Polar Star, and the Southern Cross claims ; 
(4.) The nearly complete removal of the Plug Ugly Hill gravel; 
(5.) The removal of great quantities of gravel at Little York, so as to make a connection thelies 
from the old Little York banks to those at Empire Hill ; 
(6.) The extension of mining on Chicken Point siaceaee the Sugar Loaf and Chalk Bluff ; 
(7.) The washing away of the site of the old town of You Bet and the uncovering of extensive 
areas of bed-rock along the western rim ; 
(8.) The enlargement of the opening at Waloupa ; and 
(9.) The developments at Hunt’s Hill and Quaker Hill. 
These changes, together with a few points supplementary to what has already been published, 
form the main topics of the notes I collected during my week’s stay. The changes and develop- 
ments upon the ridge above Little York, in the neighborhood of Liberty, Lowell, and Remington 
Hills, I did not have time to pay any attention to.¢ 
* Several changes of names and of position have been made on the General Gravel Map, in accordance with the 
results of Professor Pettee’s observations of the year 1879. The previously unpublished map of the Gold Run, 
Dutch Flat, Little York, and You Bet districts has also been corrected by him, and is now given with this portion 
of the Auriferous Gravels. To the map in question reference should be made, in order that the present section may 
be understood ; and it may also be used in connection with the previous account of this portion of the Gravel Re- 
gion. (See ante, pp. 143-174.)—J. D. W. 
{ Except as to certain small errors of the press, the corrections for which I have marked upon the proof-sheets 
at Cambridge. 
t For a map of the ridge above Little York I am indebted to Mr. D. W. C. Morgan, the superintendent of the 
Little York Company. 
