He could not believe what he saw.

He threw up the window and leaned out, to assure himself that he was not mistaken.

Mercy heard the sound, looked up, and met Stephen's eye.

She colored violently, bowed, and involuntarily quickened her pace.

Her companion halted, and looked up to see what had arrested her attention.
When he saw Stephen's face, he said,-- "Pshaw!" and turned again to look at Mercy.