I might have come down with you and Sylvia if I had known.

...

Is Plank dining with you alone ?" "I haven't seen him," smiled Leila evasively.

"He will tell us his plans of course when he comes." "Oh," said Quarrier, dropping his eyes and glancing furtively toward the curtained windows through which he could see the street and his Mercedes waiting at the curb.

At the same instant a hansom drove up; Sylvia sprang out, ran lightly up the low steps, and the silent, shrouded house rang with the clamour of the bell.
Leila looked curiously at Quarrier, who sat motionless, head partly averted, as though listening to something heard by him alone.