G'day,

Re De Valera:

It was John A Costello who, as Taoiseach (1948-51), implemented the Republic of Ireland Act (1948),in April 1949.
De Valera was leader of the opposition then.

Good reading about the 'Welsh Wizard' and the Treaty negotiations is to be found in the diaries of T. Jones, the Cabinet Secretary, and like Lloyd George a Welsh speaker.

Bcnu.