Was there an assassin on Grant's train?

[Rick Smith]

John,

You state the following in your post:

"The far greater likelihood, in my opinion, is that he was informed of the failure of Harney's mission and the capture of Harney at Burke Station by telegraph and ordered to proceed with the contingency plan, which Surratt had most likely received in Richmond when he was there in late March and early April . . ."

I like what you are saying here, as it more than suggests that Booth's plan was not his own; that he was recruited to do a job and was under orders, which is what I believe, but who was telegraphing Booth to instruct him to proceed with the contingency plan?

Rick