the operator at the machine, turning the crank as I climbed out.

We developed some films and plates that evening, securing some
satisfactory results from these tests. It continued to rain all that
night, with intermittent showers next morning. The rain made little
difference to us, for we were in the water much of the following day
as he boats were taken along the edge of another unrunnable rapid, a
good companion rapid for the one just passed.

This was Lower Disaster Falls, the first of many similar rapids we
were to see, but this was one of the worst of its kind. The
swift-rushing river found its channel blocked by the canyon wall on
the right side, the cliff running at right angles to the course of the
stream. The river, attacking the limestones, had cut a channel under
the wall, then turned and ran with the wall, emerging about two
hundred feet below. Standing on a rock and holding one end of a
twenty-five foot string we threw a stone attached to the other end
across to the opposite wall. The overhanging wall was within two feet
of the rushing river; a higher stage of water would hide the cut
completely from view. Think what would happen if a boat were carried
against or under that wall! We thought of it many times as we
carefully worked our boats along the shore.

Between the delays of rain, with stops for picture making, portaging
our material, and "lining" our boats, we spent almost three days in
getting past the rapids called Upper and Lower Disaster Falls, with
their combined fall of 50 feet in little more than half a mile. On the
evening of September the 26th we camped almost within sight of this
same place, at the base of a 3000-foot sugar-loaf mountain on the
right, tree-covered from top to bottom.