He looked all round the magnificent room without betraying either surprise or admiration.

He closely investigated every person in it with one glance of his cunningly watchful eyes.

Making his bow to Lady Janet, he silently showed her, as his introduction, the card that had summoned him.

And then he stood at ease, self-revealed in his own sinister identity--a police officer in plain clothes.
Nobody spoke to him.

Everybody shrank inwardly as if a reptile had crawled into the room.
He looked backward and forward, perfectly unembarrassed, between Julian and Horace.
"Is Mr.Julian Gray here ?" he asked.
Julian led Grace to a seat.