In considering their probable origin, it struck me that they might have been formed by the rush of floods from the extensive plains we had lately crossed.

The whole country indeed over which we had passed from the first creek, was without doubt very low, and must sometimes be almost entirely under water, but what, it may be asked, causes such inundation?
Such indeed was the question I asked myself, but I must say I could arrive at no satisfactory conclusion.
That these regions are subject to heavy rains I had not the slightest doubt, but could the effect of heavy rains have produced these creeks, short and uncertain in their course, rising apparently in one plain, to spread over and terminate in another, for had we gone more to the westward in our course than we did, it is probable we should never have known of the existence of any of them.

I was truly thankful that we had thus fallen upon them, and considering how much our further success depended on their continuance, I began to hope that we should find them a permanent feature in the country.
About this period and two or three days previously, we observed a white bank of clouds hanging upon the northern horizon, and extending from N.E.
to N.W.No wind affected it, but without in the least altering its shape, which was arched like a bow, it gradually faded away about 3 p.m.

Could this bank have been over any inland waters?
At the point to which I have now brought the reader, we were in lat.

27 degrees 38 minutes S., and in long.