| Clue | Source | Date |
|---|---|---|
| Fuel conduit | New York Times | 13 Apr 2024 |
| Apartment's energy source | Newsday | 08 Mar 2024 |
| Main source of energy? | New York Times | 30 May 2021 |
| Fuel conduit | Eugene Sheffer | 07 Aug 2020 |
| Conduit to some stoves | USA Today | 28 Jul 2019 |
| Underground conduit | Thomas Joseph | 22 Feb 2019 |
| Conduit to some stoves | ||
| Sight during a 1973 shortage | USA Today | 03 Jan 2018 |
| Sight during a 1973 shortage | ||
| Certain stove conduit | Newsday | 30 Oct 2016 |
| Utility conduit | Newsday | 12 Jun 2016 |
| Underground conduit |