[Sidenote: Reasons why a procreative virtue was ascribed to fire.] But why, it may be asked, should a procreative virtue be attributed to the fire, which at first sight appears to be a purely destructive agent? and why in particular should the ancestral spirits be conceived as present in it? Two different reasons perhaps led savage philosophers to these conclusions. In the first place the common mode of making fire by means of the fire-drill has suggested, as we have seen, to many savages the notion that fire is the child of the fire-sticks, in other words that the rubbing of the fire-sticks together is a sexual union which begets offspring in the shape of a flame. This of itself suffices to impress on the mind of a savage the idea that a capacity of reproduction is innate in the fire, and consequently that a woman may conceive by contact with it. Strictly speaking, he ought perhaps to refer this power of reproduction not to the fire but to the fire-sticks; but savage thought is in general too vague to distinguish clearly between cause and effect. If he thinks the matter out, as he may do if he is more than usually reflective, the savage will probably conclude that fire [Sidenote: The process of making fire by friction seems to the savage an act of generation.] exists unseen in all wood, and is only elicited from it by friction,[766] so that the spark or flame is the child, not so much of the fire-sticks, as of the parent fires in them. But this refinement of thought may well be above the reach even of a savage philosopher. The second reason which seems to have led early man to associate the fire with the souls of his ancestors was a superstitious veneration for the ancestral tree which furnished either the fuel for the sacred fire or the material out of which he carved one or both of the fire-sticks. Among the Herero, as we [Sidenote: Again, the fire was associated with the ancestors through the sacred ancestral tree which furnished either the fuel or the fire-sticks.] saw, the male fire-stick commonly is, or used to be, made out of the holy _omumborombonga_ tree, from which they believe that they and their cattle sprang in days of old. Hence nothing could be more natural than that they should regard the fire produced by the friction of a piece of the ancestral tree, as akin to themselves, the offspring of the same mighty forefather, to wit, the sacred tree. Similarly, the Vestal fire at Rome was fed with the wood of the oak, the sacred tree of Jupiter, and the first Romans are described as “born of the tree trunks and the heart of oak.”[767] No wonder, then, that the Latin kings, who claimed to represent Jupiter, and in that capacity masqueraded in his costume and made mock thunder, should have prided themselves on being sprung from a fire which was fed with the wood of the god’s holy tree; such an origin was only another form of descent from the oak and from the god of the oak, Jupiter himself.