He unobtrusively managed to locate all of the three renters of the adjoining rooms through their license plate numbers and was able to speak to two of them.
But Christiane gradually filled up a gap in the poet's life; she gave him, quietly, unobtrusively, without making demands on him, the comforts of a home.
Instead, you get clean, widespread light that blends unobtrusively into your ceiling.
Try to do this as unobtrusively as possible, but as with all things related to returning a ring, legal considerations should come first.
However, they can be a nice way to unobtrusively let someone know you're thinking about them.