He sprang to his feet and watched it eagerly; and yet when that faint column grew more dim and finally faded, he sat back constrained to confess that he was almost glad the course of the steamship was as it was. "Dan Merrithew", - Lawrence Perry

Then suddenly Susan spoke in a constrained voice, without turning her head. "Virginia", - Ellen Glasgow

You are constrained to stand wholly out of natural relation to the thing you are trying to do- the thing you've got to do, if you mean to come out alive. "The Magnetic North", - Elizabeth Robins (C. E. Raimond)

Her manner to him was easy and natural, as to a friend who deserved and possessed her warm gratitude: his was more constrained "John Halifax, Gentleman", - Dinah Maria Mulock Craik