I had, indeed, on two or three previous occasions, caught a passing view of her (as I believe has been mentioned before); but I had never stopped to scrutinize either her face or person, and had but the most vague idea of her general appearance.
Just as I had finished rolling up the compositions, the four o'clock bell rang; with my accustomed alertness in obeying that signal, I grasped my hat and evacuated the premises..