Marta Reece leading up the east gully between Low ...
Low Horn 3 is barely more than a bump on the side of Low Horn 3 (interestingly, most of the 4 summits of Low Horn 5 seem to be more significant than Low Horn 2). It appears that the north face would go direct, but the easiest route is to traverse out left, make one steep move to gain the east ridge, then walk the narrow exposed ridge to the summit.
Easiest way to get to #3 is by descending the south face of #2. However, one can easily climb the east gully (low 5th).
There is a southerly rap anchor consisting of one tiny nut, an old piton, and a slung block.
WARNING: There is a large balanced block just left of the focal point of the rap anchor. I would have trundled it, but my partner was already on rap...and it scared the bejesus out of me when I noticed how loose it was.