Vig. 23.- A “Gulf” of Lost river above its outlet at Orangeville. The water 
vises to the surface at the right of the middleground of the picture and flows 
to the right and left, forming two streams, for a very short distance which sink 
and finally rejoin the subterranean channel. ‘The little pond on the left side of :the 
picture is one of the plazes where the water sinks. Just above the heads of the 
group in the middle background is a large cave, one of the abandoned subterranean 
ckannels of the river. The second, or present channel is considerably below the 
water shown in the foreground. Here a large area has collapsed blocking the lower 
channel and forcing the water to the surface, when it again finds new channels 
around or through the obstruction to its main channel again in which it continues, 
