"We did an anthrax brochure last year, talking about the different forms and setting out all the signs of suspicious mail."

Top officials at NBC announced yesterday that an employee had developed a full-fledged case of anthrax several days after the network received "suspicious mail."

Ronge instigated the practice of checking suspicious mail.

Tons of other, less suspicious mail from the Brentwood postal station has been trucked to Ohio for irradiation.

He was able to use this for his own espionage and had all suspicious mail directed there.

Employees are supposed to leave suspicious mail where it is found.

Compiling a list of the names of all potentially affected individuals, including those who were in area when the suspicious mail was encountered.

Next day he went again to the office and opened his mail, suspicious and hopeful of its contents.

John Potter, the postmaster general, said his office would send a postcard "to everyone in America" within a week outlining how to handle suspicious mail.

The Postal Service is sending cards this week to 147 million addresses advising people on how to recognize and deal with suspicious mail.