Author: Geraint Jones, Ieuan Wyn.

This volume is the fruit of two lectures delivered at the Uwchgwerfai History Centre on the 10th and 11th of December 2020. In it clear evidence is presented about the sinister and treacherous circumstances that led to the murder of Llywelyn ap Gruffudd on that dark day, the 11th of December 1282 when, in the words of the Brut, 'all Wales was thrown to the ground'.

Awdur: Geraint Jones, Ieuan Wyn.

Ffrwyth dwy ddarlith a draddodwyd yng Nghanolfan Hanes Uwchgwyrfai ar y 10fed a'r 11eg o Ragfyr 2020 yw'r gyfrol hon. Ynddi cyflwynir tystiolaeth glir am yr amgylchiadau alaethus a bradwrus a arweiniodd at lofruddio Llywelyn ap Gruffudd ar y diwrnod tywyll hwnnw, yr 11eg o Ragfyr 1282 pan, yng ngeiriau'r Brut, 'y bwriwyd holl Gymry i'r llawr'.