The combination of Andrew Kotting and Iain Sinclair places this film very much within the psycho-geographic movement, and the resulting movie has the merits and de-merits of that genre.
On the positive side, the journey towards the Isle of Harris is the crucial aspect, and it is a trip full of memorable images and Kotting's trademark playful raiding of an apparently random array of cultural connections. The best sections are those which combine visual and aural collages to conjure up a teasing mystery about the whalebone box.
On the down side, too many passages are clearly of personal significance to the team behind the film, without the essential element of letting us in on the relevance.
Overall however, this is an intriguing film-poem that succeeds in telling a fine, pseudo-mythic tale.
I gave it 15 minutes, but didn't find it engaging at all. I'm sure it was important and satisfying to make for the authors, but it didn't speak to me.