Hannah Adams, A Dictionary of All Religions and Religious Denominations… (1817)
“ A combustible ground, about ten miles distant from Baku, a city in the north of Persia, is the scene of their devotions, where are several small temples: in one of which the Guebres pretend to preserve the sacred flame of the universal fire, which rises from the end of a large hollow cane, stuck into the ground, resembling a lamp burning with pure spirits ”
