Something inspired Alan to return the smile.

Behind that smile he was admiring the man's nerve.

His hand met Rossland's casually, but there was no uncertainty in the warmth of the other's grip.
"How d' do, Paris, old boy ?" he greeted good-humoredly.

"Saw you going in to Helen a few minutes ago, so I've been waiting for you.

She's a little frightened.