That's how a single piece got entered at the letter drop in the Boca Raton post office finance station. The others went into various street collection boxes on Friday evening before 9/11.
However, they used the same tape roll to wrap all of them.
I believe every handwriting expert who has looked at the handwriting agrees that ALL the letters and envelopes were written by the same person. The FBI's experts do. I'm the only one who claims that one item -- the date and only the date -- on the first letter was written by someone else.
The reason for the difference in the size of the writing is explained in my book.
You can rationalize things all you want, but the FACTS dispute just about everything you say.