Duncan McMartin (Partner 1846-1852) was born in Fulton County New York and married Margaret Cady, Elizabeth Cady Stanton’s sister. He was initially trained by Judge Cady and then attended Harvard Law. He practiced in Albany with Teunis Van Vechten and Judge Cady.
At the time of the Civil War McMartin joined the Union army as colonel leading the 153 NY Regiment. After the war, his life took a path away from the practice of law. He moved to Iowa and became one of the largest and most successful landowners in that State.