In 1823 Buckland published his detailed account of "Relics of the Flood", "Reliquiae Diluvianae;" or, "Observations on the Organic Remains Contained in Caves, Fissures, and Diluvial Gravel and on Other Geological Phenomena Attesting the Action of an Universal Deluge", incorporating his research suggesting that animal fossils had been dragged into the Kirkdale Cave by hyenas then covered by a layer of red mud washed in by the Deluge.