All I can get so far on Richard B. Pittman is this:
Son of John Pittman and Susannah Ward
born July 27, 1828 in Marion County, MS
died Sept. 21, 1863 in TN
buried in Marion County, MS
married Mary Anne Bullock in Nov. 1848
She is also buried in Marion County

I shall e-mail you the name and address of the gentleman who supplied this information. Maybe he can prove a more worthy resource.