CONCLUDING REMARKS. 
135 
of the peculiarities observable upon its surface or in 
its structure. That it has only recently (compared 
with other countries) obtained its present elevation, 
is often forcibly impressed upon the traveller, by the 
appearance of the country he is traversing, but no 
where have I found this to be the case in a greater 
degree, than whilst exploring that part of it, north of 
Spencer’s Gulf, where a great portion of the low 
lands intervening, between the base of Flinders 
range, and the bed of Lake Torrens, presents the 
appearance of a succession of rounded undulations 
of sand or pebbles washed perfectly smooth and 
even, looking like waves of the sea, and seeming as 
if they had not been very many centuries deserted 
by the element that had moulded them into their 
present form. In this singular district I found scat- 
tered at intervals throughout the whole area inclosed 
by, but south of, Lake Torrens, many steep-sided 
fragments of a table land,* which had evidently 
* “ An hundred miles above this, I passed a curious feature, 
called the “ Square Hills” (plate 123). I landed my canoe and 
went ashore, and to their tops to examine them. Though they 
appeared to be near the river, I found it half a day’s journey to 
travel to and from them ; they being several miles from the river. 
On ascending them I found them to be two or three hundred feet 
high, and rising on their sides at an angle of 45 deg. and on their 
tops, in some places for half a mile in length perfectly level, with 
a green turf, and corresponding exactly with the tabular hills 
spoken of above the Mandans, in plate 39, vol. 1 . I therein said 
that I should visit these hills on my way down the river y and I 
am fully convinced from close examination, that they are a part of 
