Law enforcement officials are even unsure whether or not more contaminated letters are circulating undetected through the postal system.

At the same time that the letter circulated in Estonian exile communities, radio stations in other countries broadcast the contents of the letter.

This letter circulated widely in manuscript form.

The letters circulated in Canada, mostly in the cities of Montreal and Quebec.

The letter circulated in manuscript but was not printed until much later, when the Inquisition had condemned Galileo.

The letter rapidly circulated among literary agents, editors and publishers.

A group of 27 Hutu, mostly college students, signed a letter addressed to the President and circulated among the diplomatic corps.

"Some excellent letters are still circulating privately."

A league source says letters such as these between club personnel circulate regularly on a variety of issues.

The letters circulated throughout society, fueling the rumors.