CHAP TE hh. 1X. 
SILLIMAN’S AVENUE.—RHODA’S ARCADE.—LUCY’S DOME, AND 
PASS OF EL GHOR. 
Upon landing on the farther shores of Echo 
River, we immediately enter Silliman’s Avenue, 
—so named for Professor B. Silliman, Jr., who 
visited the Cave in 1850. 
This avenue is a mile and a half long, and 
extends from Echo River to the Pass of El Ghor. 
Its height varies from twenty to forty feet, and 
it is from twenty to two hundred feet in width. 
The walls and ceiling of this avenue are rugged 
and water-worn. It is undoubtedly of recent 
formation, as compared with other parts of the 
Cave. | 
The objects of interest in Silliman’s Avenue 
come in the following order : 
1. CascaDE HALL is two hundred feet in diam- 
eter, and twenty feet high. It receives its name 
from a small cascade that falls into it from the 
ceiling. 
Of this hall Bayard Taylor says, “A few 
(103 ) 
