Is-fonds [BL] - British Library,

Details of the catalogues of BL manuscript collections can be found in M. A. E. Nickson 'The British Library: Guide to the catalogues and indexes of the Department of Manuscripts' (The British Library Board, 1978). Particularly relevant are Edward Owen 'Catalogues of the Manuscripts relating to Wales in the British Museum parts I-IV' (London, 1900, 1903, 1908, 1922); and J. Gwenogvryn Evans 'Report on Manuscripts in the Welsh Language: vol 11, part IV The British Museum' (Historical Manuscripts Commission, 1910).