Gibbon sat and listened unobserved to their strictures.
I walked about the outside, at first unobserved from within, the window was so deep and high.
The Franciscans slipped away unobserved, but Savonarola raising the host attempted to lead.
There must be countless indications of the course of Providence, for the most part unobserved, the meaning of only a few having become known to men.
Five minutes later little black-eyed three-year-old Natasha, her father's pet, having learned from her brother that Papa was asleep and Mamma was in the sitting room, ran to her father unobserved by her mother.