Backstage at the Lincoln Assassination

[Gene C]

Was this the letter he gave to John Matthews to be delivered to the National Intelligencer?

In "They Have Killed Papa Dead" by Anthony Pitch, (page 89-90) indicates he folded the letter up and put it in his pocket and left the hotel. (no mention of mailing it) Later that day, he gives a sealed letter to Mathews and asked him to deliver it to the publishers of the National Intelligencer the next morning.