400 On the Cyclones of Tasmania, ce. 
Islands on the 1st August, it would have traversed 45° in 
five days, or 9° a-day; thatis, 9 X 42 miles in 24 hours, 
which gives a mean yelocity of progression of about filteen 
miles an hour. 
Now, from noon of the 28th to noon of the 29th, the 
Duke of Lancaster sailed to the eastward at about 11 miles 
an hour; and I have shown that the Cyclone overtook and 
passed her; therefore the velocity of fifteen miles an hour 
is probably not far from the actual rate. 
This Cyclone was followed in a few days by another, of 
which the central track seems to have been considerably to 
the Northward of that of the first. A correspondent of the 
“ Adelaide Observer” states that on Saturday, the 7th of 
August, there was a most fearful flood at Clare, (north of 
Adelaide), and no arrival of mails from the South, because 
of the floods at the intervening parts. In Clare the rains 
commenced on the night of Thursday the 5th, and con- 
tinued till 5 p.m. on Saturday, when it poured down in 
torrents for ten hours. All the houses were, flooded, one 
man was drowned, and a settler had 1700 sheep drowned in 
the River Bremer. (Adelaide 85° S. 188° E.) 
At Portland (141° 88° E.) on Friday night, (6th August), 
there was one of such fearful gales from the South Kast, 
that the oldest inhabitant had not known the like before. 
The Margaret and Agnes went on shore, and was wrecked. 
At Circular Head (145° 20° E.) a most severe gale was 
experienced on Saturday night (7th), and continued with 
unabated violence up to Sunday morning. ‘he oldest in- 
habitants do not recollect ever witnessing such a gale and 
sea before, and with the highest tide. ‘The schooner Toroa 
struck, and was driven up by the sea to a considerable 
distance. ‘The schooner Antares, which had sailed from 
Launceston, put back from contrary winds, East. The gale 
