Got out on Sunday morning for a couple of hours, getting into a highseat about 0500 hrs to wait for it coming light, this is the same seat that I took a nice buck from on the 1st of the month and becoming my favourite seat. As dawn broke the woods started to come alive and I sat watching and listening just enjoying the moment. There was very little wind with just the tops of the trees moving slightly. I checked the time on my phone, 0620 hrs I thought, just 10 more minutes then I'll have a walk. As I put the phone down the distinctive sound of a buck started barking to my left. Turning my head very slowly I glanced him just over my left shoulder, he had approached on my blind side and had obviously scented me. Now sat up a tree seat full camo and leaf suit that any of our American bow hunters would be proud of, at only 40 yards he couldn't see me. However with my rifle on my right hand side I couldn't move without revealing my position. What happened next surprised me as I expected him to head back into the woods but he started to move around to my front, snorting the air, stamping his feet and barking. He seemed to have a slight limp or stoop at the rear but I wasn't sure if it was the rough ground under foot. As he went behind a laurel bush I quickly turned and positioned the rifle. Then as he appeared on the other side BANG a solid heart / lung shot. He stumbled on a few yards and went down. As I went to bleed / gralloch him I saw his rear lower leg was missing. A clean cut that had healed very well and didn't seen to be causing him any issues. All lymph nodes were normal and he was in good condition with good body weight.