Michael:I am descended from your ancestor, Henry Bartlett's second wife, Alethia. ALETHIA EMERSON was married on June 11, 1829 in Washington, DC to JOHN M. CLARK. (My line) She was born in 1805 and died on March 18, 1872 in Washington, DC. She was originially buried at the Methodist Protestant Cemetery in Alexandria, VA.She was reburied on April 10, 1888 at Glenwood Cemetery in Washington, DC in a Clark area. She was a member of Trinity United Methodist Church in Alexandria.
John M. Clark was born btwn. 1780-1790 in MD according to 1820 or 1830 Alexandria Census record. His son, John T. Clark was born in 1836 in Charles County, MD, even though they were living in Alexandria,VA. Alethia Emerson (Clark) Bartlett was born in Prince Georges County, MD I believe. I have seen on various census records VA, MD, even PA! She was widowed btwn. 1836-1840. Alethia Clark is listed as head of household in 1840 Census record.
I would be glad to send you copies of her marriage records to Henry Bartlett. Their marriage was by Reverend John M. JOnes in Alexandria, District of Columbia.
Also, an 1860 Alexandria Census lists DIANA DUNCAN living in household of her brother, Paytin C. Bartlett. I think their ages are incorrecly listed.