THROUGH HAWAII. 
231 
spheric air admitted. The same noise was produced 
among the fragments broken off, until they were quite 
cold. The adjacent stones and pieces of clay were 
frequently incrusted, either with sulphate of ammonia, 
or volcanic sal ammoniac. Considerable quantities 
were also found in the crevices of some of the neigh¬ 
bouring rocks, which were much more pungent than 
that exposed to the air. Along the bottom of the 
sulphur bank we found a number of pieces of tufa, or 
clay-stone, which appeared to have been fused, ex¬ 
tremely light and cellular. It seemed as if sulphur, or 
some other inflammable substance, had formerly occu¬ 
pied the cells in these stones. A thick fog now came 
over, which, being followed by a shower of rain, obliged 
us to leave this interesting laboratory of nature, and 
return to our companions. On the eastern side of the 
crater, we saw banks of sulphur less pure, but appa¬ 
rently more extensive, than those we had visited; but 
their distance from us, and the unfavourable state of 
the weather, prevented our examining them. On our 
way to the sulphur banks, we saw two flocks of wild 
geese, which came down from the mountains, and set¬ 
tled among the ohelo bushes, near the pools of water. 
They were smaller than the common goose, had brown 
necks, and their wings were tipped with the same 
colour. The natives informed us there were vast flocks 
in the interior, although they were never seen near 
the sea. 
Just as the sun was setting we reached the place 
where we had left our baggage, and found Messrs. 
Bishop and Harwood sitting near the spot, where the 
natives, with a few green branches of trees, some fern 
leaves, and rushes, had erected a hut. We were none 
