remarked, that, in the walls at Callo, the inter-^ 
stices between the outer and inner stones are 
filled with small pebbles cemented with clay. 
I did not observe this circumstance ; but I have 
represented it in the 23d plate, from a sketch of 
Mr. Larea’s. We see no vestige of floor, or 
roof ; but we may suppose, that the latter was 
of wood. We are also ignorant, whether the edi- 
fice had originally more than a single story, or 
not ; as the height of its walls has been diminish- 
ed no less by the avidity of the neighbouring 
peasantry, who take away the stones for their 
own use, than by the earthquakes, to which this 
unfortunate country is continually exposed. 
It is probable, that the edifices, which I have 
heard called at Peru, Quito, and as far as the 
banks of the river of Amazons, by the name of 
Inga-Pilca^ or buildings of the Inca, do not date 
farther back than the 1 3th century. Those of 
Vinaque and Tiahuanaco were constructed at a 
remoter period ; as were the walls of unbaked 
bricks, which owe their origin to the ancient in- 
habitants of Quito, the Puruays^ governed by 
the conchocando, or king of Lican, and by 
guastays^ or tributary princes. It were to be 
wished, that some learned traveller could visit 
the banks of the great lake of Titicaca, the pro- 
vince of Collao, and more especially the elevated 
plain of Tiahuanaco, which is the centre of an 
ancient civilization in South America. On tha^t 
