Champagne, the illustrator of Fulcanelli's books. Julien Champagne wrote the French translation of the Mr. Yardley's Process in front of the English text in blank frames that have been previously drawn by Frederick Hockley on all verso pages. After more than one century, this manuscript owned by Champagne's family has been published in facsimile by Éditions Les Trois R (France, 2015-2016). Later Years Sigismond Bacstrom died in 1805. References Éditions Les Trois R. Mr. Yardley's Process. France, 2015-2016. External links The copy of the admission of Sigismund Bacstrom into the Fraternity of Rosicrucians (Rosicrucianism) by the Comte de Cazal in 1794 is in the Harvard Divinity School Library at Harvard Divinity School in Cambridge, Massachusetts. A collection of 67 of Sigismund Bacstrom's drawings and watercolors is archived in the Beinecke Rare Book and Manuscript Library at Yale University Description of Mr. Yardley's Process (France, 2015-2016) on Les Éditions Les Trois R website. 1805 deaths Year of birth uncertain