[1] In 1863, Ewart conceived the idea of a blue plaque to commemorate a link between a location and a famous person or event, serving as a historical marker.
He was educated at Eton and Christ Church, Oxford, gaining the Newdigate Prize for English verse.
He was called to the bar at the Middle Temple in 1827, and the next year entered Parliament for the borough of Bletchingley in Surrey, serving until 1830.
[3] He remained a strong advocate for the abolition of capital punishment, and on his motion in 1864, a Royal Commission was appointed to consider the subject on which he sat.
[4] Other reforms which he advocated and which were carried out included an annual statement on education, and the examination of candidates for the civil service and army.