Ragnarok: The Age of Fire and Gravel - Full text of this 1883 work by Donnelly, in which he presents evidence for a fiery cataclysm thousands of years ago. Includes introduction by J.B. Hare. - http://www.sacred-texts.com/atl/rag/
Project Gutenberg Titles - Online texts of Atlantis, Caesar's Column and Ragnarok. Zipped and unzipped versions in various file formats. - http://onlinebooks.library.upenn.edu/webbin/gutbook/author?name=Donnelly%2C%20Ignatius
Atlantis, the Antediluvian World - Donnelly's 1882 classic of Atlantis studies, in HTML sections. Features an essay by Norm Wolcott, and an introduction by J.B. Hare. - http://www.sacred-texts.com/atl/ataw/