440 A. C. Peale—Ancient Outlet of Great Salt Lake. 
and — the ee was also made for him “in the 
same unequivocal manner” “in the Smithsonian Report for 
1876” ( (p. 61), ni ‘in Baird’s Annual of Scientific Discovery 
for 1876’* (p. 206), and that “ there seemed to be no occasion 
for further publication ame the matter should receive its full 
discussion in the Reports of the Survey of which Professor 
Powell has charge,” but owing to a statement + in this Journal 
for January, 1878, p. 65, ‘it seems proper” to him “to defend” 
his “ positive assertions by setting forth the facts which appear” 
to him “ to place the existence and position of the ancient out- 
let beyond question. 
As Red Rock Pass, the point of Mr. Gilbert’s discovery (?), 
is within the area assigned during the season of 1877 to Mr. 
Gannett’s division of the United States Geological Survey of 
the Territories, with which I was connected as geologist, it 
seems proper that I should call attention to several errors in 
Mr. sea statements. 
In the fi lace, his so-called discovery is not a discovery on his 
part. The fi fact that Red Rock Pass was an outlet for the lake 
that once filled the Salt Lake Basin and adjoining valleys § 
Oxford, Idaho, by which its waters were discharged into Snake River. During 
and since the desiccation of on lake, the land which it covered has been — a 
the north aes common with the region of the Laurentian lakes and the eas 
and w seaboard.” (Bulletin of the Philosophical Soci ‘ety of Weshington 
for. 1817, P. 18) 
equivocal” announcement referred to by Mr. Gilbert, is stated in 
peti hy ‘same. » words in both pallioateon, pl is eng in re followin g rather 
vague manner. “Before commencing the main work of the season, M r. Gilbert 
ng excursion in search of the outlet of tate Bon neville, the creat f ey 
lake of Utah.” * * * “The search for the point of outlet wa 
was ook at the north end of Cache Valley, a cag soiies es beyond te Bondar of 
in the Territory of Idaho. —— Report rd of Regents of the 
Smithsonian Institution for 1876. Washington, at tee and (Annual Record 
of —— and Industry for 1876, edited by Spencer F. vpaird. New York, 1877, 
p. 260 
The statement referred as is the pierre: # Toad is believed that the explora- 
tions of the survey under the direction of Dr. Hayden, the past season, et 
determined the probable icin a. of the great lake that once filled the 
Lake Basin.” dager Journal, yi Spite 1878, 
italics in p 
The i$ paragra) 
The following extracts pag the Report of the Survey for 1870, written by 
Dr. sapere show that as early as that time the extent of the great i t inland basin 
and its phony ey itions were y spprocsited by him. 
a moment a a bint bare view of the great inland basin of which 
Columbia on the north, and that of the Colorado e 
region has no visible ow composed of # multi- 
tude of smaller basins or h of which has its little lakes, 
ce of the vallevd ‘sed fol that Goan oF the m are much above 
the waters of Great Salt Lake.” (p. 172.) 
fresh-water lake ounce occupied all this immense basin 
ranges ins were scattered over it as isolated mands, 
