Robert Boyle's anonymous 'Crosey-Crucian' identified: The German alchemist and religious dissenter Peter Moritz.

Using previously neglected manuscript sources, this paper sheds light on a puzzling episode in the later life of Robert Boyle and the early career of his laboratory assistant Ambrose Godfrey. Currently, the only account of their disappointing encounter with an unnamed German adept derives from Godfrey's lost manuscript treatise 'An Apology and Letter touching a Crosey-Crucian', excerpts of which were published in 1858. Based on a comparison between that source and the papers of the virtually forgotten chymical practitioner and convicted heretic Peter Moritz (1638-ca. 1700), the authors argue that Godfrey's anonymous 'Crosey-Crucian' was none other than Moritz himself. The first part establishes that various significant and seemingly insignificant details agree precisely and thus corroborate this identification. The second part focuses on those passages among Moritz's papers that contain explicit evidence of his dealings with both Boyle and Godfrey, a sheet of notes and a lengthy epistolary 'Memorial' to an unnamed addressee. The authors contend that Moritz's 'Memorial' is a version of the same document that the adept sought to deliver to Boyle who refused to accept it, according to Godfrey's 'Apology'. For this reason, and on the basis of strong internal evidence, Boyle is identified as the intended recipient of Moritz's 'Memorial'. Taken together, these two identifications solve a long-standing riddle in Boyle scholarship and introduce a significant addition to his extant correspondence.

From the archives of scientific diplomacy: science and the shared interests of Samuel Hartlib's London and Frederick Clodius's Gottorf.

Many historians have traced the accumulation of scientific archives via communication networks. Engines for communication in early modernity have included trade, the extrapolitical Republic of Letters, religious enthusiasm, and the centralization of large emerging information states. The communication between Samuel Hartlib, John Dury, Duke Friedrich III of Gottorf-Holstein, and his key agent in England, Frederick Clodius, points to a less obvious but no less important impetus--the international negotiations of smaller states. Smaller states shaped communication networks in an international (albeit politically and religiously slanted) direction. Their networks of negotiation contributed to the internationalization of emerging science through a political and religious concept of shared interest. While interest has been central to social studies of science, interest itself has not often been historicized within the history of science. This case study demonstrates the co-production of science and society by tracing how period concepts of interest made science international.

Samuel Hartlib on the death of Descartes: a rediscovered letter to Henry More.

This paper discloses the content of a previously overlooked epistle by the Anglo-Prussian intelligencer Samuel Hartlib to Henry More concerning the death of René Descartes. After a discussion situating the letter within the sequence of the More-Hartlib correspondence, an analysis of the rhetorical structure of the epistle is offered, followed by a brief assessment of Hartlib's attitude towards Descartes, and the identification of his source concerning the news of the philosopher's death. An account of the transmission of the letter via a nineteenth-century periodical is also provided. The text of Hartlib's letter and an overlooked passage of Hartlib's diary concerning Descartes's death, which draws on the content of the More letter, are presented as appendixes.

"Ein Liebhaber des Mysterii, und ein grosser Verwandter desselben." Toward the Life of Balthasar Walther: Kabbalist, Alchemist and Wandering Paracelsian Physician.

Despite the attention recently paid to Jakob Böhme's life and works, the Görlitz theosopher's most famous disciple, Balthasar Walther (1558-c.1630), remains something of a historical puzzle. Utilizing several recently rediscovered print and manuscript sources located by the author, the present article seeks to provide the first detailed biographical study of Walther, highlighting his significance to sixteenth and seventeenth century history in a myriad of contexts. Far from being merely a follower of Böhme, Walther emerges as significant in his own right as a physician, Paracelsian, Kabbalist, Weigelian, religious heretic, and distributor of magical manuscripts, whose personal networks extended across Europe and beyond. In addition to providing a biography, this article seeks to discover new avenues of enquiry in which information concerning Walther's life and thought might be uncovered and contextualized. This investigation simultaneously throws light upon Walther himself, as well as Jakob Böhme's often neglected intellectual and social Umwelt. It also points to new and entirely unexamined sources for Böhme's thought.