Unmarked (Anthology Short Story)

Unmarked is a short story published in The Horus Heresy series that was originally part of an anthology. Unmarked was first published as part of the Mark of Calth main series anthology in April 2013. The cover image used is that of Mark of Calth, as Unmarked has yet to be published separately. Unmarked is a sequel to the events of Book 19, Know No Fear, and a direct sequel to the short story Athame, which was also published in the Mark of Calth anthology.

Synopsis
Oll Persson and a small band of Calth survivors begin their journey to Terra by using an Athame to travel through space and time.