Most maidens bowled in a first-class innings

29 SR Barwick v Somerset at Swansea, 1994
27 JC Clay v Leicestershire at Swansea, 1934
26 W Wooller v Derbyshire at Derby, 1955
25 DJ Shepherd v Northamptonshire at Swansea, 1964
25 RDB Croft v Northamptonshire at Sophia Gardens, Cardiff, 2001
24 DJ Shepherd v Somerset at Cardiff Arms Park, 1956
24 DJ Shepherd v Cambridge University at Margam, 1963
24 DJ Shepherd v Northamptonshire at Northampton, 1963
24 DJ Shepherd v South Africans at Swansea, 1965