ABC #010: John and Ulric Dahlgren, Rev Matthew Simpson - Friends of Abraham Lincoln:

• Admiral John Dahlgren was the father of Naval Ordnance, and the father of Colonel Ulric Dahlgren of the infamous Dahlgren affair during the Civil War that may have directly led to the assassination of their friend Abraham Lincoln. 
• Bishop Matthew Simpson - you've seen his statue on Belmont - was a confidante who delivered Lincoln’s funeral oration in Springfield, Illinois.