Mary Herbert Edgar died in 1912. Interesting would be to go to the cemetery in Portsmouth England where Colonel Herbert is buried. At least to get his first name. Thomas Hopkins Edgar was probably born in New York, at least that is where he worked when he met Mary Herbert. Edgar is a Scottish name, and Hopkins must be a family name as well.
Someone can research that line when they have the time.
Thomas Hopkins Edgar died in 1898. Could have been his brother's dates. His brother had a daughter named Mamie Edgar. Edgar also had two sisters. She had a daughter named Lila and lived on Cape Cod.