ADMINISTRATIVE REPORT 81 
these structures characteristic of the Mesa Verde. In one 
of them there was a well-made wall of secondary construction 
showing a secondary occupation and ruder masonry. This 
kiva showed signs of having been abandoned and _ later 
reoccupied, but how many years elapsed between the two 
occupations was not evident from data available. 
The excavation of this Mesa Verde tower led to new ideas 
of the structure and use of these remains, hundreds of which 
are found scattered in the canyons and on the mesas of the 
northern tributaries of the upper San Juan River. This 
tower is a fair example of the type of these buildings. It was 
probably an outlook for observations of the sun and cere- 
monies connected with the sky god. 
The first type of tower recognized in the Mesa Verde is a 
simple lookout situated naturally on the summit of a hill or 
high elevation, but unaccompanied by any other building; 
the second type has basal rooms which apparently are used 
for storage of food or possibly for habitation. Far View 
Tower is classified in a third type in which we have a tower 
rising from basal subterranean kivas, granaries, and dwellings. 
The purpose of this type of tower is the same as Pipe Shrine 
House. 
During the greater part of August the tops of the walls of 
Far View House were covered with cement to protect them 
from the elements, and it is believed the protected walls will 
remain upright for several years without further repair. 
The permanent protection of these open ruins is always 
difficult and costly, but necessary. There still remain 
many unsolved problems on the Mesa Verde awaiting atten- 
tion, but with small appropriations new ruins can not be 
opened and those already opened can not be repaired. 
Some distance north of Far View Tower is the depression 
long ago christened Mummy Lake. Its true nature is un- 
known, though it may have been a reservoir; but no mum- 
mies have ever been found in its vicinity. In the thick 
cedars about it, situated on the right hand of the road, there 
are several small mounds indicating ruins, generally habita- 
tions, surrounding kivas. In one of these there are walls 
made of large stones set on edge, standing above ground. 
