Thinking. . .
| Geyser: | Old Faithful |
| Date/Time: | 2020-09-18 @ 1656 |
| Entrant: | hkoenig |
| Observer: | Washburn, Doane, et.al. |
| Time Entered: | 2020-09-18 16:58:54 |
| Time Uploaded: | 2020-09-18 16:58:54 |
| Submitted to: | Geysertimes.org |
| Note: | First observed and reported eruption, late afternoon, 1870 Sep 18. |