WORD SPIRAL

Starting from 1, fill in the grid clockwise with four-letter words. The last letter of each word becomes the first letter of the next to reveal a type of shoe.

1. Therefore

2. Rebuff

3. Male pig

4. Boat of logs

5. Experiment

6. Short-term worker

7. In addition

8. Foot part

9. Direction

10. Roof slab

11. Not odd

12. Bird's home

13. Cash register

14. Sediment

15. Went fast

16. Intravenous feed