ry the scent, surely that would supply the missing cause."

"Of course!" Adam spoke with conviction.

"Now, from what you tell me, the negro had just come from the direction
of Diana's Grove, carrying the dead snakes which the mongoose had killed
the previous morning. Might not the scent have been carried that way?"

"Of course it might, and probably was. I never thought of that. Is
there any possible way of guessing approximately how long a scent will
remain? You see, this is a natural scent, and may derive from a place
where it has been effective for thousands of years. Then, does a scent
of any kind carry with it any form or quality of another kind, either
good or evil? I ask you because one ancient name of the house lived in
by the lady who was attacked by the mongoose was 'The Lair of the White
Worm.' If any of these things be so, our difficulties have multiplied
indefinitely. They may even change in kind. We may get into moral
entanglements; before we know it, we may be in the midst of a struggle
between good and evil."

Sir Nathaniel smiled gravely.

"With regard to the first question--so far as I know, there are no fixed
periods for which a scent may be active--I think we may take it that that
period does not run into thousands of years. As to whether any moral
change accompanies a physical one, I can only say that I have met no
proof of the fact. At the same time, we must remember that 'good' and
'evil' are terms so wide as to take in the whole scheme of creation, and
all that is implied by them and by their mutual action and reaction.
Generally, I would say that in the scheme of a First Cause anything is
possible. So long as the inherent forces or tendencies of any one thing
are veiled from us we must expect mystery."

"There is one other question on which I should like to ask your opinion.
Suppose that there are any permanent forces appertaining to the past,
what we may call 'survivals,' do these belong to good as well as to evil?
For instance, if the scent of the primaeval monster can so remain in
proportion to the original strength, can the same be true of things of
good import?"

Sir Nathaniel thought for a while before he answered.

"We must be careful not to confuse the physical and the moral. I can see
that already you have switched on the moral entirely, so perhaps we had
better follow it up first. On the side of the moral, we have certain
justification for belief in the utterance