William Duffield
Kings Point, New York
| Date | Swim | Route | Km | Age | Time/Place |
|---|---|---|---|---|---|
| 1988 Aug 27 | Manhattan Island Marathon Swim | Manhattan circumnavigation (CCW) | 45.9 | 18-19 | 08:45:33 (18/NA) |
| 1991 Aug 10 | Manhattan Island Marathon Swim | Manhattan circumnavigation (CCW) | 45.9 | 21 | 08:16:17 (23/41) |