I can't promise a link here, but my great-great grandfather married a woman named Mary A. Miller. It may be the same Mary A. Miller you mention. She was born in March 1852 and died September 1917, I believe. Her husband was William Henry Clarridge, from Virginia originally. They lived in DC.

I am also related to BIRCH (my current family and grandfather and great grandfather -- all from DC area:

Philip W. Birch (b. 5/1858) married to Jessie Lavina Moore (b. 11/1865)

Wilbur Griffith Birch
Wilbur Everett Birch
Platt Hodges Birch
Clayton G. Birch
Jessie Birch Matthews

If you think there may be a connection, please let me know.
DebeT@aol.com