Thomas Vaughan's birth in 1612 instead of 1621-2, because Foster's Alumni Oxonienses being yet unpublished, he was ignorant of the record of that date preserved in the University Registers. But we can go a step further. We can confute him, not only by pointing to the books he did not use, but by pointing to those he did. It has already been shown that the ascription to Vaughan of the English translation of Maier's Themis Aurea is due to a misunderstanding[l] of a phrase used by Anthony à Wood. The Athenae Oxonienses then was one source of the compilation. Another was the Histoire de la Philosophie Hermétique, written by Lenglet-Dufresnoy in 1742. Here is the proof. Miss Vaughan supports her statement as to the birth-date in 1612 by a quotation from the Introitus Apertus, in which the writer states it to have been composed "en l'an 1645 de notre salut, et le trente-troisième de mon age." This she professes to translate from the editio princeps published by Jean Lange in 1667. As a matter of fact it is taken from the version given in Lenglet-Dufresnoy's book. And Lenglet-Dufresnoy followed, not the edition of 1667, but the later edition published by J. M. Faust at Frankfort in 1706. In this the words are "trigesimo tertio," whereas in the editio princeps they are "vicesimo tertio," and in W. Cooper's English translation of 1669, "in the 23rd year of my age," thus bringing the date of the birth of Eirenaeus Philalethes not to 1612, but to 1622. The "legend of Philalethes" need detain us no longer. Miss Vaughan's narrative is a very insufficient basis for regarding the pious minister and mystic which Thomas Vaughan appears to have been as a secret enemy of Christianity and a worshipper of Lucifer. [xlviii] [xlix] [l] But when the legend is set aside, there still remain certain questions suggested by it which may be considered without much reference to the statements of[li] Miss Vaughan. Was Thomas Vaughan a Rosicrucian? And was he, admittedly the author of a series of tracts under the name of Eugenius Philalethes, also the author of those which bear the name of Eirenaeus Philalethes? The first question is, I am afraid, insoluble, until it has been decided whether the Fraternity of R. C. ever had an actual existence. Anthony à Wood states that Thomas Vaughan was a zealous Rosicrucian, but probably Anthony à Wood took the term in the general sense of mystic and alchemist. On the other hand Vaughan himself, in his preface to the English translation of the Rosicrucian manifestoes, seems to disavow any personal acquaintance with the members of the fraternity. Even this