ghost.

After a time Gregory straightened and moistened his dry lips.

"There's a man sitting down there--see here, the sixth row, next
the aisle; there's a girl in a blue dress beside him. See him? Do
you know who he is?"

"Never saw him before."

For perhaps two minutes Gregory continued to stare. Then he moved
over to the side of the house and braced against the wall continued
his close and anxious inspection. After a time he turned away and,
passing behind the boxes, made his way into the wings. Bassett's
curiosity was aroused, especially when, shortly after, Gregory
reappeared, bringing with him a small man in an untidy suit who was
probably, Bassett surmised, the stage manager.

He saw the small man stare, nod, stand watching, and finally
disappear, and Gregory resume his former position and attitude
against the side wall. Throughout the last act Gregory did not
once look at the stage. He continued his steady, unwavering study
of the man in the sixth row seat next the aisle, and Bassett
continued his study of the little man.

His long training made him quick to scent a story. He was not sure,
of course, but the situation appeared to him at least suggestive.
With the end of the play he wandered out with the crowd, edging his
way close to the man and girl who had focused Gregory's attention,
and following them into the street. He saw only a tall man with a