unobserved

The first evening we went to it, and he, unobserved, made furtive sketches of the most prominent people and the prettiest girls.

Mrs. Haughstone mentioned it in due course, however, having watched the tête-à-tête from her bedroom window, unobserved.

But the graceless Henrietta stuck her tongue out and stole into the passage, whence she hoped to reach the workroom unobserved.

A ladder was planted and thirty-four men scaled the walls unobserved, when a chance noise startled the guard.

When we had gone a little way beyond the gate, I pulled my hat over my eyes, and indulged these sad retrospections unobserved.