Daniel Bedinger Lucas Esq. letter and stamped envelope dated 1857 any idea of value or where i can find out?

Question

This letter and stamped envelope (3 cent) dated 1857, is too poet, senator and lawyer daniel Beddinger lucas. It is from his cousin and mentions many names cousin mary Washington,cousin Jefferson but most important name is John Beall, who he represented for treason and who was hung for it. Beall was all so Best friends with John wilkes Booth and it is said that he killed lincoln for not pardoning Beall. Very interesting letter, any idea of value or where i can find out more about it.

Answer 1

Try this auction house and Abe Museum.