ALONG SHORE 
143 
ing cape or V-shaped promontory that stretches 
out into the sea. It is the outlying guard, and 
so long as it stands it protects what is behind it. 
When the sea finally wears away the point it 
is likely to leave a sunken base but a few feet 
below the surface, over which the waves break in 
spray ; or perhaps there remains one of those 
fantastic pinnacles or pillars, usually called 
Devil's Pulpits, which may be seen along almost 
any rocky coast. At times again, waves wear- 
ing upon a soft portion of a rock hollow out 
caverns or perhaps passages clear through the 
promontory, into which the water rushes and is- 
sues on the other side in a tumult of spray. When 
the supporting sides of the cavern are of sturdy 
material, the roof may remain after the rest of the 
promontory has been eaten through, in which 
case we have the natural bridge or arch—a not 
infrequent sight on rocky coasts, and certainly 
a picturesque one. A more common way, how- 
ever, of wearing the rock is by the water fol- 
lowing the seams and cleavages opened by frost. 
The savage thrust of the sea through these 
cracks sometimes results in the ‘spouting- 
horn,” which flings up its jet of foam with 
great force, and under sunlight with surpris- 
ing beauty of effect. Still more common is the 
Rock forms 
made by 
water. 
Pulpits, 
bridges, 
and cav- 
erns. 
