To track these tracks, to leave your own prints beside them, is to sense nothing so simple as time travel, a sudden whisking back to the Mesolithic. No the uncanniness of the experience involves a feeling of co-presence: the prehistoric and the present matching up such that it is unclear who walks in whose tracks. It is this combination of intimacy and remoteness that gives these trails their unsettling power. They are among the earliest texts, from a period of history devoid of recorded narrative. Following them, we are reading one of the earliest sections, told not in print but in footprint (362-363).