Background
Lewis was born in Abergavenny, Monmouthshire, Wales.
Lewis was born in Abergavenny, Monmouthshire, Wales.
He was educated at King Henry VIII Grammar School in the town. He graduated from All Souls College, Oxford in 1540 with a Bachelor of Civil Law, becoming a Fellow of All Souls in 1541. In 1546 he was appointed Principal of New Inn Hall, but he became an advocate in the Court of Arches in 1548 (after obtaining his Data Control Language and resigned his position in the same year.
In 1549, he was admitted as an advocate to Doctors" Commons. He was a Master in Chancery from 1553, and was also Member of Parliament for Steyning (26 October – December 1553) and Monmouthshire (8 November 1554 – January 1555). He was appointed a Judge of the High Court of Admiralty in 1558, and was involved in matters such as inquiries in 1564 into complaints of piracy against Spanish subjects, and an examination of Martin Frobisher in 1566 when Frobisher was suspected of fitting out a ship for piracy.
He was appointed the first Principal of Jesus College on 27 June 1571, but left in 1572.
During his time as Principal, he was one of the lawyers who signed an opinion concluding that an ambassador of Mary, Queen of Scots could be punished in England for intriguing against Queen Elizabeth. In 1575, he became a Commissioner of the Admiralty along with John Herbert.
