54 ARCHITECTURE OF ANTS. 
In other fragments we notice avenues, 
opened laterally, including portions of 
walls and transverse partitions, erected 
here and there, within the galleries, so 
as toform separate chambers. When the 
work is further advanced, we always ob- 
serve round holes, encased, as it were, be- 
tween two pillars, cut out in the same 
wall. ‘These holes in course of time be- 
come square, and the pillars, originally 
arched at both ends, are worked into 
regular columns by the chisel of our 
sculptors. This, then, is the second 
specimen of their art. ‘This portion of 
the edifice will probably remain in this 
state. | 
But here are fragments differently 
wrought, in which these same partitions, 
pierced now in every part, and hewn 
skilfully, are transformed into colonnades, 
which sustain the upper stories, and leave 
a free communication throughout their 
whole extent. We can readily conceive 
how parallel galleries hollowed out upon 
the same plan, and the sides taken down, 
