The Yule log, Yule clog, or Christmas block is a specially selected log burnt on a hearth as a winter tradition in regions of Europe, and subsequently North America. The origin of the folk custom is unclear. Like other traditions associated with Yule (such as the Yule boar), the custom may ultimately derive from Proto-Indo-European religion as similar traditions have been recorded in Celtic, Germanic, Baltic and Slavic paganism, among others. American folklorist Linda Watts provides the following overview of the custom: The familiar custom of burning the Yule log dates back to earlier solstice celebrations and the tradition of bonfires. The Christmas practice calls for burning a portion of the log each evening until Twelfth Night (January 6). The log is subsequently placed beneath the bed for luck, and particularly for protection from the household threats of lightning and, with some irony, fire. Many have beliefs based on the yule log as it burns, and by counting the sparks and such, they seek to discern their fortunes for the new year and beyond. Watts notes that the Yule log is one of various "emblem[s] of divine light" that feature in winter holiday customs (other examples include the Yule fire and Yule candle). Origins According to the Dictionary of English Folklore, although the concept of Yule extends far into the ancient Germanic record long before Christianization, the first "clear" references to the tradition appear in the 17th century, and thus it is unclear from where or when exactly the custom extends. However, it has long been observed that the custom may have much earlier origins, extending from customs observed in Germanic paganism. As early as 1725, Henry Bourne sought an origin for the Yule log in Anglo-Saxon paganism: Our Fore-Fathers, when the common Devices of Eve were over, and Night was come on, were wont to light up Candles of an uncommon Size, which were called Christmas-Candles, and to lay a Log of Wood upon the Fire, which they termed a Yule-Clog, or Christmas-Block. These were to Illuminate the House, and turn the Night into Day; which custom, in some Measure, is still kept up in the Northern Parts. It hath, in all probability, been derived from the Saxons. For Bede tells us, That [sic] this very Night was observed in this Land before, by the Heathen Saxons. They began, says he, their Year on the Eight of the Calenders