Thomas Arthur Lewis (21 September 1881 – 18 July 1923) was a Welsh school teacher, barrister and Liberal Party politician.

[4] After University, Lewis worked briefly as a school teacher[5] but in 1910 he moved to London to become the private secretary to Freddie Guest who was at that time the Liberal MP for East Dorset.

[7] By the time of the 1918 general election Guest had become one of Lloyd George's closest advisers and his patronage must have been useful to Lewis in securing the nomination to become Coalition Liberal candidate for the Pontypridd Division of Glamorgan.

As a result of the debate, which was supported by the Welsh members present, Lloyd George established a Speaker's Conference on Devolution which sat from October 1919 – May 1920.

[15] In 1922, Lewis was appointed a Junior Lord of the Treasury to enable him to be the government's Welsh whip but under the constitutional arrangements of the day this meant he had to resign and fight a by-election in his Pontypridd seat.

[16] The by-election took place on 25 July 1922 and was a straight fight between Lewis and Thomas Isaac Mardy Jones for Labour.

The 1922 general election took place on 15 November, and by then Lewis had secured adoption as the Lloyd George, National Liberal candidate for the University of Wales Parliamentary constituency.