The very secret of delivery made him cautious, made him suspect it had to do with that woman.

She was beside the band-stand, still conversing with the Major, apparently oblivious to any other presence, her face turned aside.

Assured of this, he opened the paper, and glanced at the few hastily scribbled lines.
"I trust you, and you must believe I do not do this without cause.
During the intermission be in the hotel parlor.".