Almost certainly walked over Beinn Tharsuinn on the way to Bidein a Choire Sheasgaich, but at that time Alfie shunned the Corbetts and didn't wait for a summit photo. So, an added leg to the day to correct this. Crossed over River Carron at Liar and followed the path to Bearneas. Cut off left to gain ridge of Sgurr na Feartaig - but left it for nasty traverse to the bealach and get the snap. Back down and up over Feartaig. A new track almost certainly led back to where I ended up - but the walk down to the valley was more interesting. Alfie squeezed through deer fence at burn, dark for return river crossing - gorse bushes were disorientating but glittered in the torch light. Stunning winter day, bright and no wind.