Following Saint-Yves d'Alveydre's death, two publications entitled L'Archéomètre appeared. The first was the study begun in July-August 1910 in the Revue La Gnose, which is the subject of this book. The other is the compilation by Papus's group, "Les Amis de Saint-Yves". The latter has acquired a status of reference, not because of the quality of its content, but because it was the only one to be republished since then.The Archeometer of La Gnose was published from July-August 1910 to February 1912. This study remained unfinished when the Revue ceased publication, probably due to a lack of subscriptions. For the first time, we are also reproducing notes written by René Guénon for the published study: the preparation of the article in the March 1912 issue of La Gnose, and two other texts. Our work was based on René Guénon's handwritten notes, handwritten versions of published articles, and unpublished texts.We have given priority to this handwritten version, followed by the Revue version, including errata. Illustrations have been cleaned up, and colors added where necessary to make them clearer. The handwritten version shows that René Guénon was the editor of the published articles, but it is not possible to identify him exactly as their author. Furthermore, it was found that the content of this study was a partial reworking of the Order of the Temple Renovated's lectures, given from 1908 to 1910.