Background
He was born in Perth, the fourth son of John Dewar, Senior the distiller and founder of John Dewar & Sons.
He was born in Perth, the fourth son of John Dewar, Senior the distiller and founder of John Dewar & Sons.
He was educated at Perth Academy and then at Edinburgh University, graduating in 1882.
He was admitted to the Scottish Bar in 1885, and in 1892 was appointed the Advocate-Depute for the Glasgow circuit, a minor governmental post, which he held until 1895 when the Conservative Party came into power. He had been made King"s Counsel in 1904, and served as Solicitor General for Scotland from February 1909–1910. He was re-elected in the January 1910 general election, but resigned from the Commons in April that year when he was appointed a Senator of the College of Justice, replacing the deceased McLaren.
He took the judicial title of Lord Dewar, and served in the post until his death.
He is buried in the 20th century extension to Dean Cemetery in Edinburgh, against the northmost wall.
26th United Kingdom Parliament. 28th United Kingdom Parliament. 29th United Kingdom Parliament]
In an 1899 by-election he was elected as the Member of Parliament for Edinburgh South, defeating Major-General Attorney - General Wauchope, but was defeated himself in the 1900 general election by Sir Andrew Agnew.