| Clue | Source | Date |
|---|---|---|
| Vessels for mules, perhaps? | ||
| Stack at Famous Footwear, and a hint to the sets of circled letters | LA Times Daily | 06 Oct 2022 |
| Diorama holders, or an apt title for this puzzle | Wall Street Journal | 30 Nov 2017 |
| They may hold a baseball card collection |