64 GIORDANO BRUNO PART 



have been the summons to Zurich. He had made the 

 aquaintance of a young Swiss squire, Hainzel, an 

 Augsburger by birth, at whose castle of Elgg in 

 Switzerland a gay and open hospitality was extended to 

 a number of the bizarre and the learned spirits of the 

 time : Hainzel had leanings towards the Black Arts, 

 Alchemy and the rest, but had interest to spare for 

 any others about which an air of mystery clung, such 

 as Bruno's Art of Memory and of Knowledge. Bruno 



Zurich, spent a few months with him near Zurich and wrote for 

 him the De imaginum composition, etc. as a handbook 

 of these arts. Another of the Frankfort pupils would 

 also be in Zurich, the brilliant but erratic Raphael 

 Eglin, who published in 1609 at Marburg (where he was 

 professor of theology), a work Bruno had dictated in 

 Zurich, the Summa Terminorum Metaphysicorum. 

 Eglin suffered along with his friend Hainzel from 

 the trickery of the Alchemists, to whom recourse was 

 had in the hope of repairing the fortunes dissipated by 

 the Squire of Elgg's hospitality. 1 The Summa is 

 dedicated in a letter of April 1595 (from Zurich) to 

 Frederic a Salices, and in a personal reminiscence 

 Eglin remarks on Bruno's fluency of thought and 

 speech " standing on one foot, he would both think 

 and dictate as fast as the pen could follow : so rapid 

 was his mind, so forceful his spirit." 



In order perhaps to print the De Imaginum Com- 

 positione for Hainzel, or to complete the other works, 

 Bruno returned to Frankfort about the beginning of 



March, March, 1591, and on the iyth of that month obtained 



permission to publish the De Minimo? It is to this 



period probably that he referred when he spoke of him- 



self before the Venetian tribunal, as having spent six 



1 Vide Brunnhofer and Sigwart. 2 Censor's Register : Frankfort Archives. 



