Was there an assassin on Grant's train?

[L Verge]

I think Bill may be elaborating on some information that I was in on back when the White House historian, William Seale, had just finished his tome on the history of that grand old mansion. The Come Retribution gang was working on their book and were delighted to find out that I had once had some conversations with Mr. Seale. They were working on the theory that Confederate agents could gain access to the building, but needed to know how.

On their behalf, I contacted Mr. Seale and put all parties in touch with each other. Mr. Seale had an immediate answer. The sewer lines into the White House at that time were large enough for a man of general height to stand upright in them. I don't believe that anyone could prove that agents did use this means, but it was possible.