[Nogbad]

Thank you.

FBI officials said the letter, from an anonymous writer, had a postmark from St. Petersburg, Fla. There are "some similarities" between the handwriting in the NBC letter and a suspicious letter received at the New York Times, which also was mailed from St. Petersburg, according to Mawn. Tests on the powder in the NBC letter proved negative, Lack said, but on Friday a skin biopsy came back positive. That prompted NBC to immediately cordon off its third-floor offices in Rockefeller Center so federal investigators could examine the newsroom site for contamination.

[daves_brother]

The Times letter may have been mailed from St. Petersburg, but it didn't contain anthrax.
The NBC letter is reported in this linked story to have been sent from St. Petersburg, but later stories, and the photos of the letter itself, show that the postmark was Trenton, NJ.
I have not seen any references to the Stevens letter being mailed from St. Petersburg. In fact, I didn't even know that it had been found/recovered. I'll be interested to see what you find on that subject in the search you mention in a later post.

[daves_brother]

Ooops...my bad. Sorry.
More than one anthrax-related letter to Brokaw. However, the one from St. Petersburg was negative for anthrax according to Alamo-Girl's post. The one with the anthrax was the one postmarked in Trenton.