|Died||January 1940 (aged 57)
Dennis reached the final of the World Championship in 1927, 1929, 1930, and 1931, but was beaten every time by Joe Davis. The closest Dennis came to defeating Davis was in the 1931 tournament, when the pair were the only two entrants. The match, played in the back room of his own pub in Nottingham, saw Dennis lead 14-10 and 19-16, before losing 21-25. He competed in two more championships, making his last appearance in 1933. He also reached the final of the tournament in 1927, losing again to Davis in the final 11-20. After his final loss in 1931, he played in the event twice more, losing in the semi final on both occasions, to Clark McConachy, and Willie Smith respectively.
He had three sons: Thomas Leslie, William Henry by his first wife and David with his second wife, Kathleen William was a useful amateur snooker player and was a finalist in the 1937 English Amateur Championship, losing 5–3 to Kingsley Kennerley.
Non-ranking event finals: 4 (4 runners-up)
|Outcome||Year||Championship||Opponent in the final||Score|
|Runner-up||1927||World Snooker Championship||Joe Davis||11–20|
|Runner-up||1929||World Snooker Championship||Joe Davis||14–19|
|Runner-up||1930||World Snooker Championship||Joe Davis||12–25|
|Runner-up||1931||World Snooker Championship||Joe Davis||21–25|
- "Sudden death of Mr T A Dennis – Well-known Notts billiards professional". Nottingham Evening Post. 17 January 1940. Retrieved 9 November 2015 – via British Newspaper Archive. (Subscription required (. ))
- "Tom Dennis's bad luck – Has to withdraw from snooker championship". Nottingham Evening Post. 31 March 1936. Retrieved 9 November 2015 – via British Newspaper Archive. (Subscription required (. ))
- England & Wales, Birth Index: 1916-2005, Births registered in Jul, Aug & Sept 1939
- England & Wales, Marriage Index: 1916-2005, Marriages registered in Jan, Feb, March 1939
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