Thanks Marshall for pointing this out. I looked on Google Earth to confirm this. Good catch, the fact that we were above the clouds and that this was posted way later after the trip had an effect with me naming this photo.
I love Mount Stuart. I knew it wasn't Sherpa Peak because Sherpa has that distinctive balanced rock on top. I had to look it up on here to see that this sub-peak is called the West Horn. It isn't officially labelled on any maps.