94 CA VE AND CLIFF D WELLERS. 
every line of commerce in Mexico from 
the hands of foreigners—a fact that is 
most emphatically true of the northern 
part of that rich territory. 
After cooking our lunch of cabrillas and 
boca dulces on the northern or inside shore 
of San Vincente Island we made a visit 
to the caves on the southern or seaward 
face of the same island. This led us 
through a c little gorge between two high, 
beetling cliffs, into which the sea had 
excavated the caves we were to see. 
Through, or rather under, this gorge 
the waters pour into a small underground 
funnel of the solid rock before they reach 
the little lagoon beyond. At all hours 
the reverberation of the rushing tide is 
like thunder, as it beats backward and for¬ 
ward in its prison. The upper crust of 
the funnel is pierced with occasional holes 
