ation, a veritable oasis of Anglo-Saxon cleanliness.

On a July morning in 1911, while strolling up the Ayahuaycco quebrada,
an affluent of the Chunchullumayo, in company with Professor Foote
and Surgeon Erving, my interest was aroused by the sight of several
bones and potsherds exposed by recent erosion in the stratified gravel
banks of the little gulch. Further examination showed that recent
erosion had also cut through an ancient ash heap. On the side toward
Cuzco I discovered a section of stone wall, built of roughly finished
stones more or less carefully fitted together, which at first sight
appeared to have been built to prevent further washing away of that
side of the gulch. Yet above the wall and flush with its surface
the bank appeared to consist of stratified gravel, indicating that
the wall antedated the gravel deposits. Fifty feet farther up the
quebrada another portion of wall appeared under the gravel bank. On
top of the bank was a cultivated field! Half an hour's digging in
the compact gravel showed that there was more wall underneath the
field. Later investigation by Dr. Bowman showed that the wall was
about three feet thick and nine feet in height, carefully faced on
both sides with roughly cut stone and filled in with rubble, a type
of stonework not uncommon in the foundations of some of the older
buildings in the western part of the city of Cuzco.

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FIGURE

Huatanay Vallye, Cuzco, and the Ayahuaycco Quebrada
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Even at first sight it was obvious that this wall, built by man,
was completely covered to a depth of six or eight feet by a compact
water-laid gravel bank. This was sufficiently difficult to understand,
yet a few days later, while endeavoring to solve the puzzle,
I found something even more exciting. Half a mile farther up the
gulch, the road, newly cut, ran close to the compact, perpendicular
gravel bank. About five feet above the road I saw what looked like
one of the small rocks which are freely interspersed throughout the
gravels here. Closer examination showed it to be the end of a human
femur. Apparently it formed an integral part of the gravel bank,
which rose almost perpendicularly for seventy or eighty feet above
it. Impressed by the possibilities in case it should turn out to be
true that here, in the heart of Inca Land, a human bone had been buried
under seventy-five feet of gravel, I refrained from disturbing it
until I could get Dr. Bowman and Professor Foote,