Martin was a member of the [[Annapolis Convention]] and a delegate from Maryland to the [[Continental Congress]] from 1784 to 1785. He was appointed attorney-general of Maryland February 11,1778.
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Martin was a member of the [[Annapolis Convention]] and a delegate from Maryland to the [[Continental Congress]] from 1784 to 1785. Other members of the Maryland delegation to the Convention were [[Daniel of St. Thomas Jenifer]], [[James McHenry]], [[John Francis Mercer]] and [[Daniel Carroll]].
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He was appointed attorney-general of Maryland February 11,1778.