Если надо, я ссылочки скину, но вот в общих чертах: On Halloween, for thousands of years, druid priests have conducted diabolical worship ceremonies in which cats, horses, sheep, oxen, human beings and other offerings were rounded up, stuffed into wicca cages and burned to death. These human and animal sacrifices were apparently required to appease Samhain and keep the spirits from harming them. It was also believed that at this time of year the invisible "gates" between the natural world and the spirit world would open, allowing free movement between the two worlds.