Smart, whose brother Jack was also a first-class cricketer and a Test match umpire, was considered by Wisden to be one of the "most explosive county batsmen" during the 1930s, and is well known for his then-world record hitting of thirty-two runs from a single over against Hampshire.
However, in 1934 he played a full season, scoring over 1,000 runs – a landmark he would then go on to consistently achieve until the outbreak of the Second World War, as well as breaking the world record for runs scored from off one single over, and club records for partnerships and six-hitting.
He made his debut facing Surrey at the Kennington Oval on 8 May, scoring nine and a duck and bowling thirteen wicketless overs.
[7][8] In 1927 Smart, who had played only one first-class match since leaving Warwickshire – an invitational game in 1926 – returned to the County Championship for Glamorgan and would feature for them intermittently over the next few years, making little impression with ball or bat.
[2][8] His century against that touring South African side formed part of a record partnership for the final wicket: he made 131 while batting with the tail.