should mistake or miss her, I waited in attendance with him until she
came, which was at an early hour and in haste.

I had also placed a man upon Stony Island Avenue, armed with minute
descriptions of Smug, Greenback Bob, Delbras, and the brunette, and
with instructions to watch the cafes and houses upon a line with the
Fair-grounds, and especially within a certain radius within which we
knew parties of their peculiar sort were received 'and no questions
asked.'

As for Brainerd and myself, we had laid out a new system, and upon it
we founded a strong hope for ultimate success; though we recognised
more and more the fact that we had to cope with men who were more than
ordinarily keen, clever, and skilled in the fine art of dodging and
baffling pursuit. In fact, I was now thoroughly convinced that they
were living and working upon the supposition that they were constantly
watched and pursued, and that they governed their movements and
shifted their abode accordingly.

There was one thing which weighed upon my mind--I had almost said
conscience--and troubled me uncomfortably, and that was the attitude I
was permitting the disguised brunette to maintain toward Miss Jenrys.

Since she had entered so earnestly into the work of ferreting out the
motive for the brunette's persistent attentions, she had manifested
such a willingness to aid me by allowing that personage to continue
the acquaintance already begun, that, while I appreciated it as an
earnest of her trust in me, it was, nevertheless, embarrassing.

I was not yet ready to tell her that I believed the brunette to be a
man in masquerade--I must be able to prove my charge first; and yet I
had determined that they should not meet again if I could stand
between them.

It was to speak an additional word of caution, and to tell the two
ladies that two stalwart and trusty chair-pushers were engaged for
their evening sight-seeing, that I set out one morning to make my
first call upon them at their apartment on Washington Avenue. It had
been decided that, even in such a throng as that of the White City, it
would not be wise to meet within the grounds too often, or too openly.
We were sure of more or less surveillance from one source; and I was
quite ready to believe that from more than one direction interested
eyes were watching the coming and going of Miss Jenrys, if not of
myself.

Already I had tested the cooking and service of a variety of the
restaurants, cafe