FIJI-NEW ZEALAND EXPEDITION 161 
place is igneous, some of it basaltic, and some of it is a coarse, 
angular agglomerate. In places enormous blocks, handled in flood 
time, lie in the bed of the stream. It is hoped that this source of 
energy will soon be harnessed for we can think of no greater boon 
to Suva than cheap hydro-electric power. The distance of its 
transmission from the Navua gorge to Suva is not over twenty- 
five or thirty miles. 
Namuamua, on the right bank of the Navua, is a very pretty 
village. During our stay here I made an interesting side-trip up 
a tributary of the Navua to a place where native informers de- 
clared they had found showings of coal, and in fact they had some 
pieces of carbonaceous shale which burned with some difficulty in 
the charcoal fire at Goko’s cook house. The deposit was finally 
reached and proved to be a clayey sandstone alternating with thin 
bands and lenses of shale. The whole was much jointed and 
where exposed, weathered rapidly along the joints into a crumbly 
clay. In these ledges, of which ten to fifteen feet are exposed 
along the stream, are bits of carboncaeous material from a frac- 
tion of an inch to an inch or more in diameter. They appear to 
be inclusions washed in from some earlier deposit at the time the 
shale and sandstone were laid down. There was nothing to in- 
dicate a coal deposit of any value either here or in the original 
beds whence the carbonaceous shale originated. 
On the Wainukovo, a small tributary from the left into the 
Navua, below Namuamua, is an over-hanging bluff two to three 
hundred feet high. We found yellowish, sedimentary rocks, large- 
ly ealeareous, with some sandy and clayey strata interspersed. 
The beds dip up the Navua, at an angle of 20° or more. The 
lower part of the section is a conglomeration of voleanic ejecta, 
rolled pebbles, and other debris. The most interesting feature is 
the presence of worn coral heads in the talus at the foot of the 
cliff and in relief over its face. Their precise age has not been 
determined but they have a story to reveal. 
The journey up the Navua beyond this point was on foot. The 
country grew more rugged and the trail, doubtless as old as the 
Roman roads of Britain, led by the easiest yet steep grades to the 
head-waters of the stream, among towering mountains hard by 
the Korombasambasanga range. The ‘trail finally enters the 
Navuni-ivi or Namosi gorge at a certain point in which is a low 
eol where grows Seemann’s orange tree. Trickling down the grade 
