Rt. Hon. Robert Dundas of Arniston was born on 18 July 1713.  He was the son of Robert Dundas, Lord Arniston.  He married, secondly, Jean Grant, daughter of William Grant, Lord Prestongrange.  He married, firstly, Henrietta Carmichael, daughter of Sir James Carmichael and Margaret Baillie, on 17 October 1741.

    Rt. Hon. Robert Dundas of Arniston lived at Arniston, Midlothian, Scotland. He held the office of Lord President of the Court of Session between 1760 and 1787

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Wikipedia Biographical Summary

"Robert Dundas of Arniston, the younger (1713–1787) was a Scottish judge...

...The eldest son of Robert Dundas (1685–1753), he was deducated at Edinburgh University and studied Roman law at Utrecht University...

...Dundas served as Solicitor General for Scotland from 1742 to 1746 and as Lord Advocate from 1754 to 1760. He was Member of Parliament for Midlothian from 1754. He was Lord President of the Court of Session from 1760 to 1787, losing his popularity for giving his casting vote against Archibald (Stewart) Douglas in the Douglas peerage case."

SOURCE: Wikipedia contributors, 'Robert Dundas of Arniston, the younger', Wikipedia, The Free Encyclopedia, 6 May 2012, 03:44 UTC, <http://en.wikipedia.org/w/index.php?title=Robert_Dundas_of_Arniston,_the_younger&oldid=490921063> [accessed 21 August 2012]

Additional References

• An Historical Account of the Senators of the College of Justice: From Its Institution in MDXXXII; by George Brunton, David Haig; 1832; Page 523