Some games traditionally played at Halloween are forms of divination. In All Hallows' Eve celebrations during the Middle Ages, these activities historically occurred only in rural areas of medieval Europe and were only done by a "rare few" as these were considered to be "deadly serious" practices.[85] A traditional Scottish form of divining one's future spouse is to carve an apple in one long strip, then toss the peel over one's shoulder. The peel is believed to land in the shape of the first letter of the future spouse's name.[147] Unmarried women were told that if they sat in a darkened room and gazed into a mirror on Halloween night, the face of their future husband would appear in the mirror.[148] However, if they were destined to die before marriage, a skull would appear. The custom was widespread enough to be commemorated on greeting cards[149] from the late 19th century and early 20th century.