Y Bibl dwyleithog
Subtitle: yn cynnwys yr Ysgrythyrau Santaidd, yn ol y cyfieithad awdurdodedig, yn yr ieithoedd cymraeg a saesoneg, gyda darlleniadau a chyfeirindau vmylenol helaeth, cyflenwedig a rhai nodiadau eglurhaol, gan y parch Joseph Harris
Publisher: J. Harris a J. A. Williams
Published: 1823
Place of publication: Abertawy
Language: wel; eng
Other titles: Duglott Bible.; Bible. English. Authorized. 1823.
Work titles: Bible Welsh 1823-27
Notes: Added t.p.; The duoglott Bible, comprising the Holy Scriptures, according to the authoized version, in the Welsh and English languages, with copious marginal readings and references, interspersed with some explanatory notes, by the Rev. Joeph Harris. Swansea, J. Harris and J.A. Williams, 1823-27.

Earliest edition in Welsh and English. cf. Brit. & for. Bible soc. Hist. cat. #9622.