A volume, 1750-1793, containing autograph verse, in Welsh, by John Jenkins (Ioan Siencyn), together with works by other poets, detailed in a title which appears on p. v: Cydymmaith i'r Awen, Sef Casgliad o Gywyddau ac Englynion, a chaniadau awenyddol ar amryw Destynnau : O waith y Beirdd mwyaf godidawg O'r Deheudir : yn yr oes ddiwethaf a aeth heibio, ar oes Bressennol sef, Gwaith Mr. Iefan Gryffydd o'r Twrgwyn, a'r Parchedig Mr. Alban Tomas Curat Blaen Porth, a Thre Mein : Mr. Siengcin Tomas or Cwmdu, Mr. Iefan Tomas o Lanarth, y Parchedig Uchelddusg Mr. Iefan Iefans o Ledrod. A gasglwyd, ac a gyfansoddwyd gan mwyaf gan Ioan Siengcin o Abertifi. Y mae'r Awdwyr uchod wedi meirw oll: ond myfi Ioan Siengcin : ac os gwelaf i yr 20ed Dydd fawrth nesaf mi fyddaf 75. 1790. Much of the contents of this book was utilised by John Howell (Ioan ab Hywel) in his Collection of Poetry entitled Blodau Dyfed, printed at Carmarthen in 1824. Parts of the book were probably written as early as 1752, as appears from some englynion on p. iii, which are dated Med. 14, 1752, and it was completed in 1793 (p. 2).