[1] He won the 1929 English Junior Championship, for professional players aged under 25, by defeating Joe Earlam 4,000-3,433.

[1][3] In 1929-30 he was employed by the cue sports company Burroughes and Watts to referee tournaments between leading players such as Walter Lindrum, Tom Newman and Willie Smith.

[1] Sidney Smith was the first player to make a total clearance in snooker competition, a break of 133 on 11 December 1936 in the Daily Mail Gold Cup.

[2] This was a world record break, eclipsing the previous best of 119 which had been achieved by both Joe Davis and Horace Lindrum.

[1] In the 1937 World Championship he eliminated Alec Brown in the quarter finals, reaching a winning score at 16–11.