The earliest Norse people venerated the horse as a symbol of fertility, and white horses were slaughtered at sacrificial feasts and ceremonies. When these settlers arrived in Iceland, they brought their beliefs, and their horses, with them. Horses played a significant part in Norse mythology, and several horses played major roles in the Norse myths, among them the eight-footed pacer named Sleipnir, owned by Odin, chief of the Norse gods. Skalm, a mare who is the first Icelandic horse known by name, appeared in the "Book of Settlements" from the 12th century. According to the book, a chieftain named Seal-Thorir founded a settlement at the place where Skalm stopped and lay down with her pack. Horses also play key roles in the Icelandic sagas "Hrafnkel's Saga", "Njal's Saga" and "Grettir's Saga". Although written in the 13th century, these three sagas are set as far back as the 9th century. This early literature has an influence today, with many riding clubs and horse herds in modern Iceland still bearing the names of horses from Norse mythology.