Works Printed in London

Soon after Bruno’s arrival in England appeared “The Explanation of Thirty Seals ¹ For Finding Out, Arranging And Memorising All Sciences And Arts. To which Is Added A Seal Of Seals For Comparing All Mental Operations, And Is Conducive In The Highest Degree To Embracing Their Reasons,” etc. etc. ² Some copies, as already stated, do not contain a preliminary poem, a letter to Castelnau, the famous letter to the Vice Chancellor of Oxford and an Introduction. ³ The second part of the “Incantation of Circe” is reprinted under the title of “The Art of Recollection.” ⁴ Then follows “The Explanation of Thirty Seals” and then more important pages, “The Seal of Seals.” The “Thirty Seals” is but one more exposition of Mnemonics. The “Seal of Seals,” ⁵ in two parts, is Neo-Platonic and is very artificially arranged. But it is an important work. Bruno wishes it to be understood that his views must not be taken as absolutely true, but as more conformable with sense and an understanding of the world than is the generally received opinion to which they may seem to be in opposition.