As a matter of fact, this technique of indications does not necessarily work only from the visible periphery to the grey forms of organic interiority: it can establish necessary networks connecting any point in the body with any other: thus, in certain cases, a single element may be enough to suggest the general architecture of an organism; an entire animal may be recognized 'from a single bone, from a single facet of a bone: a method that has given such curious results when applied to fossilized animals'.