Marshall B. Champlain
He was admitted to the bar in 1843, and practised at Cuba, N.Y. He was District Attorney of Allegany County in 1845.
In 1861 and 1863 he was the Democratic candidate for New York State Attorney General, but was defeated by his former fellow Democrats Daniel S. Dickinson and John Cochrane who were nominated by Union conventions of Republicans and War Democrats. In 1867, he finally was elected, and re-elected in 1869, to the office. In 1871 he was defeated when running for re-election.
He was a delegate to the New York State Constitutional Convention of 1867.
He died of pneumonia.
-  His obit, in NYT on March 10, 1879 [erroneously stating he was DA of Genesee Co., and stating that he was a descendant of Samuel de Champlain who had no known descendants]
-  Political Graveyard
- Google Book The New York Civil List compiled by Franklin Benjamin Hough (Weed, Parsons and Co., 1858) [name given on page 264 as Marshall B. Chaplin, on page 370 as Champlin]
- Google Book The New York State Register for 1843 edited by O. L. Holley (page 360, J. Disturnell, Albany NY, 1843) [listed as Marshall B. Champlin, Master in Chancery, not DA]
- Google Book The New York State Register for 1847 edited by Orville Luther Holley (page 38 and 126, J. Disturnell, New York NY, 1847) [listed as Marshall B. Champlin, attorney at law; Lucien P. Wetherby is DA at this time]
-  His nomination, in NYT on September 22, 1861 [name given as Marshal B. Champlin]
|New York Assembly|
John R. Hartshorn
|New York State Assembly
Allegany County, 2nd District
Lucius S. May
John H. Martindale
|New York State Attorney General
Francis C. Barlow