Was Stanton a murder target?

[RJNorton]

Thanks, John. Your reply is excellent - much appreciated.

Still, however, I wonder why she didn't take things more seriously. She must have wondered why this mysterious "White House messenger" was eating lunch with a man whose behavior was making her extremely unsettled. It would have taken only a few minutes for the Grants' carriage to make a quick stop at the White House. Julia could have even remained in the carriage as Ulysses made a quick trip inside to say to Mary Lincoln, "Did you send a messenger to the Willard Hotel? If not, I am concerned for your safety. Something's up."

I wonder if Booth realized that he potentially could have raised a red flag by sending Herold to Julia Grant's room.