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 an office item.

1. School test 2. Night insect 3. Perceive sound 4. Spool 5. Big cat 6. Bird's home 7. Drawn matches 8. Sodium chloride

9. Furniture wood 10. Flying toy 11. Water jug 12. Wealthy 13. Trilbies, say 14. Substitutes, in short 15. Pronounce indistinctly 16. Harvest