Use "hark back" in a sentence

1. about the recently created country of Israel hark back

2. The tendency of a tired eye is to see less differentiation, and to hark back to a dull uniformity; so get in touch at once with the vital differences while your eye is fresh and your vision keen

3. We will leave this question undecided and hark back to our morass again, for we have left a good deal unexplored

4. And now, if you have quite finished, we will hark back to Kensington and see what the manager of Harding Brothers has to say to the matter

5. And now, if you have quite finished, we will hark back to Kensington and see what the manager of Harding Brothers has to say on the matter