The National Archives
Search our website
  • Search our website
  • Search our records
The National Archives Logo
Guide reference: Legal Records Information 15
Last updated: 21 March 2007

1. Introduction

Wales came under the Court of Great Sessions, 1543-1830. The records are held by the National Library of Wales, Aberystwyth, Dyfed SY23 3BU. Information relating to criminals, punishment and crime has been extracted from these records and the resulting database is available online.

From 1831, the Welsh records are held at The National Archives, Kew.

2. Criminal trials at the Welsh assizes

The best place to begin a search in the assize records themselves is with the Crown Minute Book, Gaol Book or Agenda Book if one survives - these list the accused and summarise cases heard, or about to be heard, often noting the plea, verdict and sentence. There may be a separate series of minute books for offences, such as the failure of local communities to keep local roads and bridges in a good state of repair. The indictments are the formal statement of the charge against the accused, usually annotated with plea, verdict and sentence and filed in large unwieldy bundles

3. Criminal trials: key

County Crown & Gaol Books Indictments Depositions Other
Anglesey 1831-1938
1835-83
1945-51
ASSI 61
ASSI 62
ASSI 79
1831-1945
1945-1971
ASSI 64
ASSI 83
1831-1944
1945-1971
ASSI 65
ASSI 84
ASSI 59 ,ASSI 63 , ASSI 66 , ASSI 67
Breconshire 1841-1842
1844-1946
1945-51
ASSI 74
ASSI 76
ASSI 79
1834-1945
1945-1971
ASSI 71
ASSI 83
1837-1971
1945-1971
ASSI 72
ASSI 84
ASSI 73 , ASSI 77
Caernarvonshire 1831-1938
1835-83
1945-51
ASSI 61
ASSI 62
ASSI 79
1831-1945
1945-1971
ASSI 64
ASSI 83
1831-1944
1945-1971
ASSI 65
ASSI 84
ASSI 59 , ASSI 63 , ASSI 66 , ASSI 67
Cardiganshire 1841-2
1844-1946
1945-51
ASSI 74
ASSI 76
ASSI 79
1834-1945
1945-1971
ASSI 71
ASSI 83
1837-1971
1945-1971
ASSI 72
ASSI 84
ASSI 73 , ASSI 77
Carmarthenshire 1841-2
1844-1946
1945-51
ASSI 74
ASSI 76
ASSI 79
1834-1945
1945-1971
ASSI 71
ASSI 83
1837-1971
1945-1971
ASSI 72
ASSI 84
ASSI 73 , ASSI 77
Denbighshire 1831-1938
1835-83
1945-51
ASSI 61
ASSI 62
ASSI 79
1831-1945
1945-1971
ASSI 64
ASSI 83
1831-1944
1945-1971
ASSI 65
ASSI 84
ASSI 59 , ASSI 63 , ASSI 66 , ASSI 67
Flint 1831-1938
1835-83
1945-51
ASSI 61
ASSI 62
ASSI 79
1831-1945
1945-1971
ASSI 64
ASSI 83
1831-1944 1945-1971 ASSI 65
ASSI 84
ASSI 59 , ASSI 63 , ASSI 66 , ASSI 67
Glamorganshire 1841-2
1844-1946
1945-51
ASSI 74
ASSI 76
ASSI 79

1834-1945
1945-1971
ASSI 71
ASSI 83
1837-1971
1945-1971
ASSI 72
ASSI 84
ASSI 73 , ASSI 77
Merionethshire 1831-1938
1835-83
1945-51
ASSI 61
ASSI 62
ASSI 79
1831-1945
1945-1971
ASSI 64
ASSI 83
1831-1944
1945-1971
ASSI 65
ASSI 84
ASSI 59 , ASSI 63 , ASSI 66 , ASSI 67
Montgomeryshire 1831-1938
1835-83
1945-51
ASSI 61
ASSI 62
ASSI 79
1831-1945
1945-1971
ASSI 64
ASSI 83
1831-1944
1945-1971
ASSI 65
ASSI 84
ASSI 59 , ASSI 63 , ASSI 66 , ASSI 67
Pembrokeshire 1841-2
1844-1946 1945-51
ASSI 74
ASSI 76
ASSI 79
1834-1945
1945-1971
ASSI 71
ASSI 83
1837-1971
1945-1971
ASSI 72
ASSI 84
ASSI 73 , ASSI 77
Radnor 1841-2
1844-1946
1945-51
ASSI 74
ASSI 76
ASSI 79
1834-1945
1945-1971
ASSI 71
ASSI 83
1837-1971
1945-1971
ASSI 72
ASSI 84
ASSI 73 , ASSI 77

4. Civil trials at the Welsh assizes

Although the central common law courts were based in Westminster, it was possible, and indeed usual, for trials in civil disputes to be held locally, under a writ known as nisi prius. In effect this meant that the cases were heard at the next visit of the circuit judges to hold assize courts in the relevant county. Some records of trials held at nisi prius are therefore found amongst the records of the clerks of assize in ASSI classes.

5. Civil trials: key

County Civil Cases Other Records
Anglesey 1843-1924
1914-26
1867-1912
1945-70
ASSI 57
ASSI 58
ASSI 60
ASSI 78
ASSI 59 , ASSI 63 , ASSI 66 , ASSI 67
Breconshire 1846-1943
1945-70
ASSI 75
ASSI 78
ASSI 73 , ASSI 77
Caernarvonshire 1843-1924
1914-26
1867-1912
1945-70
ASSI 57
ASSI 58
ASSI 60
ASSI 78
ASSI 59 , ASSI 63 , ASSI 66 , ASSI 67
Cardiganshire 1846-1943
1945-70
ASSI 75
ASSI 78
ASSI 73 , ASSI 77
Carmarthenshire 1846-1943
1945-70
ASSI 75
ASSI 78
ASSI 73 , ASSI 77
Denbighshire 1843-1924
1914-26
1867-1912
1945-70
ASSI 57
ASSI 58
ASSI 60
ASSI 78
ASSI 59 , ASSI 63 , ASSI 66 , ASSI 67
Flint 1843-1924
1914-26
1867-1912
1945-70
ASSI 57
ASSI 58
ASSI 60
ASSI 78
ASSI 59 , ASSI 63 , ASSI 66 , ASSI 67
Glamorganshire 1846-1943
1945-70
ASSI 75
ASSI 78
ASSI 73 , ASSI 77
Merionethshire 1843-1924
1914-26
1867-1912
1945-70
ASSI 57
ASSI 58
ASSI 60
ASSI 78
ASSI 59 , ASSI 63 , ASSI 66 , ASSI 67
Montgomeryshire 1843-1924
1914-26
1867-1912
1945-70
ASSI 57
ASSI 58
ASSI 60
ASSI 78
ASSI 59 , ASSI 63 , ASSI 66 , ASSI 67
Pembrokeshire 1846-1943
1945-70
ASSI 75
ASSI 78
ASSI 73 , ASSI 77
Radnor 1846-1943
1945-70
ASSI 75
ASSI 78
ASSI 73 , ASSI 77
Guide reference: Legal Records Information 15

Our catalogue

Search descriptions of 20 million documents from the UK central government, law courts and other national bodies.

  • Download this guide as a PDF