An international (French/German/Polish/Belgian) research initiative is working towards an edition of the complete correspondence of the 17th-century Gdansk Astronomer Johannes Hevelius: http://www.aihs-iahs.org/en/projects/hevelius.

The bulk of the letters are kept in the Library of the Observatoire de Paris and in the Bibliothèque Nationale de France.

Scholars and historians of astronomy who know of additional letters by and to Hevelius preserved in archives or libraries elsewhere are welcome to share their knowlede with Klaus-Dieter Herbst who is presently making a survey of such scattered items.

Please send any hints you can give to [email protected].