| Full name: | William Isaac Sewart |
| Born: | 12th November 1881, Allendale East, South Australia, Australia |
| Died: | 13th December 1928, Caulfield, Melbourne, Victoria, Australia |
| Batting: | Right-hand batsman |
| Bowling: | Right-arm medium pace |
| Teams: | Queensland (Main FC: 1908/09); Victoria (Main FC: 1909/10-1918/19); All teams |
| Lists of matches and more detailed statistics | |
| First-Class Career Batting and Fielding (1908/09-1918/19) | ||||||||||
| M | I | NO | Runs | HS | Ave | 100 | 50 | Ct | ||
| Overall | 13 | 23 | 2 | 435 | 143 | 20.71 | 1 | 1 | 5 | |
| First-Class Career Bowling (1908/09-1918/19) | ||||||||||
| Balls | Mdns | Runs | Wkts | BB | Ave | 5wI | 10wM | SRate | Econ | |
| Overall | 132 | 3 | 67 | 0 | 0-7 | 3.04 | ||||