| Country: | England |
| Fullname: | Arthur Henry Seymour Casswell |
| Birth Date: | 8 October 1892 |
| Birth Place: | Alford, Surrey, England |
| Death Place: | Tardebigge, Worcestershire, England |
| Batting: | Right-handed |
| Bowling: | Unknown-arm fast-medium |
| Columns: | 1 |
| Column1: | First-class |
| Matches1: | 1 |
| Runs1: | 7 |
| Bat Avg1: | 7.00 |
| 100S/50S1: | –/– |
| Top Score1: | 7 |
| Deliveries1: | 36 |
| Wickets1: | 0 |
| Bowl Avg1: | – |
| Fivefor1: | – |
| Tenfor1: | – |
| Best Bowling1: | – |
| Catches/Stumpings1: | 1/– |
| Date: | 26 September |
| Year: | 2019 |
| Source: | http://www.espncricinfo.com/england/content/player/11057.html Cricinfo |
Arthur Henry Seymour Casswell (8 October 1892 – 29 October 1940) was an English first-class cricketer and an officer in the Royal Navy and the Royal Naval Air Service.