I'm I correct in assuming that you have seen the Blackford Papers which are also held by the Maryland Historical Society?
I have been researching the 5th Alabama Infantry Regiment for a number of year, but, unfortunately, have yet to make to the Maryland Historical Society. If you have in fact seen the Blackford Papers, perhaps you could comment on the content of the material. Are there any Civil War era letters of diaries? Do you feel the information would contain insights into the experiences of the men of the 5th Al which are unavailable elsewhere?