Personal blog of Dorji Wangchuk alias Kuliśeśvara (Germany). It is for pure speculations and reflections.
Dear D,Horn = teacher? My goodness no, not clear at all. We anxiously await your further elucidation.D
Although this post is lacking context, it would seem obvious to me that a gu has somehow vanished here. Or else this must be some kind of insider joke - for gu rus only :-)