N, 
Rock bridge in Virginia, 
19 
lour. ■*'*eir plumage is uniformly of a brown grey 
M. Humboldt, from whose account these 
extracted, was assured by the Indians, that 
^'^ken undescribed birds are of tlie size of a 
3ft 'vij » • , — t*ivy \ji. VAAV^ 014/V,/ 
a '^Utit' ‘ and a curved beak. On 
a « depth of the valley, it was impossible to 
, T|,<.^’?ear view of them. 
p ®''adon of the bridges of Icononzo— these sur- 
k |''o tj)fj 'Auctions of nature — above the level of the ocean, 
tJf 3 _ '^sand seven hundred feet, somewhat more tlrau 
concluding his description of them, M- 
notices 
several other natural bridges, among 
ti^'-'^tone ?*■ Cedar-creek, in Virginia. It is an arch of 
C t\v '’■^S nil aperture of ninety feet, and an deva- 
p ^'ndred and twenty feet above the level of 
P the creek. He considers this, as well as the 
C of called Rumichaca, which is on the docli- 
’ke A.iri'^ .porphyritic mountains of Chumban, in the 
province of Los Pastes; together w'ith 
ilo/ oo, Madre de Dios, named Dantcu, near To- 
llip R tbe'^®’^?° i nnd the perforated rock near Gran- 
‘'lofta P''°';‘“oe of Alentejo, in Portugal, as geological 
of f '^Rich have some resemblance to the natural 
%t ^ tile but be doubts whether, in any other 
"I I ^ ®ti'an^°’^'^’ ’^®te has yet been discovered an acci- 
\vjv^?^®tit so extraordinary as that of three masses 
^tal reciprocally sustaining each other, form a 
«OCK BRIDGE IN VIRGINIA. 
I? tf Of described by Mr. Jefferson, late 
V Pfod • ^tiited States, as one of tlie most sublime 
“®*-'°us of nature. It is on the ascent of a 
Ik'® cloven through its length 
\ ”’ttee,fl‘ convulsion. It is in height two hundred 
!?ttj .'he ®®t, about filty feet in breadth at the bottom, 
ubout ninety feet. The passage 
at tk Avidth, and the thickness of 
Ui' P^'uimit of the arch about forty feet. A 
thickness is constituted by a coat of earth, 
* growth to many large trees. The residue. 
