You are quite right - B Street is now Independence Avenue and runs behind the Mall. Tenth Street and Independence would be approximately where the Forrestal Building is as part of the L'Enfant Plaza federal complex.
It is sort of diagonally across town from where Betty and Mike used to park while conducting research. I'm not going to ask what they were researching while parking....
Hopefully this will be a challenge. A person whose name is part of the overall Lincoln assassination saga died June 28, 1926, and is buried in Hampton National Cemetery, Hampton, Virginia. Who is he?
Right on, Rich! I figured you might know this one. Many years ago I wrote Mike Kauffman seeking the proper spelling of the man's name. Mike was incredibly helpful and added much information in his response. He even mentioned that the guy who arrested Ned Spangler is actually buried in the plot next to Ritterspaugh.
According to what Mike told me Pvt. Sidney Raymond made the actual arrest of Spangler. Mike wrote that the two men (Raymond and Rittersback/Ritterspaugh) are buried only 3 or 4 feet apart.
There is yet another spelling....Rittersbach.... here.