At the end, did MTL have a sense of vindication

[LincolnToddFan]

Yes, Eva I agree. I always thought it odd that there is no published reference that MTL makes to her husband's killer by name, or even the conspirators. The closest she came was when she wrote to Francis Bicknell Carpenter on Nov15 1865, exactly seven months to the day of Lincoln's death:

"....I firmly believe, that if he had remained at the W.H. on that night of darkness when the fiends prevailed, he would have been horribly cut to pieces-Those fiends, had too long contemplated this inhuman murder to have allowed him to escape[/i]." MTL Letters, Anthology pg# 285

She seems to have believed he would have met Seward's fate even if he'd stayed home that night.

In any case, MTL's silence on the subject of her husband's assassin isn't really unique. JFK's widow dismissed Oswald as "that silly little Communist" and during the trial of Sirhan Sirhan who assassinated RFK, his widow Ethel forbade anyone to mention his name or the trial in her presence. "Anyone who does is not a friend" is what she is said to have remarked. (The Kennedys: An American Drama, Peter Collier& David Horowitz)