He was admitted an
Advocate in 1587, a
Lord of Session in 1592, appointed
Lord Advocate in 1596. On 22 November 1596, James VI ordered him to try Jonet Garvie at an assize for witchcraft. He was
Lord Clerk Register from 1612, and in 1616 became
Lord President of the Court of Session.
Administrator He was on very friendly terms with
James VI, his legal talents being useful to the king. In July 1593 he was appointed to a council to manage the estates and finances of
Anne of Denmark. He was one of the eight men called the
Octavians who were appointed to manage the finances of Scotland. Widely regarded as an able administrator, Hamilton was entrusted with a large share in the government of Scotland when James moved to London in 1603.
Anne of Denmark and Prince Henry Hamilton was present at
Stirling Castle on 10 May 1603 when
Anne of Denmark argued with
Marie Stewart, Countess of Mar and the
Master of Mar to gain custody of her son
Prince Henry. He wrote an account of the incident. Anne of Denmark, according to Hamilton, told
Lady Paisley and her physician
Martin Schöner that she had taken "balm water". The
Earl of Montrose, Lord Chancellor of Scotland, made efforts to calm the controversy and help set Anne of Denmark on her way to England in June.
Silver mine at Hilderston In 1606 a promising
deposit of silver was found on Hamilton's land at
Hilderston near
Bathgate. For a time, Hamilton worked the mine, employing the English mining entrepreneur
Bevis Bulmer. Hamilton was appointed "Master of Metals" in Scotland in March 1607. Bulmer left the works in August 1608. The dissolution of their partnership was acrimonious. In January 1608 King James decided to claim the mine for himself. Hamilton was compensated for his loss by the King by May 1608, around the time a daughter Anna Hamilton was born, according to a letter from
Lady Jane Drummond.
Lord Clerk Register In 1612 he was appointed Lord Clerk Register to the Privy Council to succeed
John Skene. After the death of James VI, the earl resigned his offices, but served
Charles I as
Keeper of the Privy Seal of Scotland. Thomas was referred to familiarly by his friends as 'Tam o' the Cowgate', his Edinburgh residence being in that street.
Petition in 1617 On 5 April, as Lord Secretary of Scotland, Lord Binning attended a meeting at
Whitehall Palace to discuss proposals for
Prince Charles to marry a French princess. King James I came to Scotland in 1617. Anne Ker, the wife of
John Elphinstone, 2nd Lord Balmerino, described how her sister, Julian Ker, Lady Binning, presented a petition on behalf of
Robert Carr, 1st Earl of Somerset to the King at
Holyrood Palace. Hamilton's wife was Somerset's sister. The petitioners, Somerset's Scottish allies, including Hamilton, kneeled in the privy gallery while Lady Binning gave the petition to the king. Hamilton then discussed the petition with the king afterwards, but it did not lead to the release of the earl.
Peerages On 19 November 1613, he was created a
Lord of Parliament as Lord Binning. Further, on 20 March 1619, he was created Earl of Melrose. Upon the death of the first and last
Viscount of Haddington (on 28 February 1626), the king agreed to exchange the title of Earl of Melrose to that of
Earl of Haddington, with the original precedence and remainder to heirs male bearing the surname and
Arms of Hamilton. In 1628 The Earl of Haddington purchased the
Tyninghame estate for 200,000 merks. In 1624, under the title of Thomas Hamilton, Earl of Melrose, he purchased
Balgone House south-east of
North Berwick. ==Personal life==