MEMOIR OH PENNANT. 
23 
“ The eruption burst from the place of its discharge 
like a cataract of thick ink, and continued in a stream 
of the same appearance, intermixed wnth great frag- 
ments of peat, with their heathy surface; then flowed 
like a tide cliarged with pieces of UTeck, filling the 
whole valley, running up every little opening, and, 
on its retreat, leaving upon the shores tremendous 
heaps of turf, memorials of the height this dark tor- 
rent arrived at. The farther it flowed, the more 
room it had to expand, lessening in depth, till it 
mixed its stream with that of the Esk.” 
Arrives again at Glasgow, and having spent some 
days in visiting the places of note on the Clyde, sets 
sail for Greenock in a little cutter of ninety tons, to 
explore the Western Isles of Scotland. He first 
landed on Bute and Aivan ; on the latter he re- 
mained for some time, and devoted a considerable 
apace to the description of its rocky coast, produce, 
and natural history. On the mountains here he met 
with what he terms a gigantic frog, and notices it as 
distinct from the common species of the Lowlands. 
This frog, common on most of the alpine districts of 
Scotland, has been often noticed ; hut I am not sure 
that species from these localities have been properly 
examined, and consider it probable that it may yet 
constitute a third species to the fauna of Scotland. 
From this he was anxious to visit the Crag of 
Ailsa, where he was much struck with its preci- 
])ices, and birds, numerous as swarms of bees. He 
enumerates what he saw, which are not beyond the 
