I had a very memorable stalk one summer eveining near Windsor a few years back, it was my first evening on the land and i had already sighted 3 Roe Bucks in the same field on several days previous. I stalked the field and sat by a very old Oak tree and eventually a Roe buck appeared. I watched him for 15 minutes and was mesmerised by his lovley antlers. he walked towards me and i eventually put him to sleep at a distance of 65 meters. i sat down and gave him a couple of minutes when i pulled my phone out and set it to the camera, in order to take a picture of this magnificant buck. as i looked up no longer than 2 minutes from shooting the Roe , my eyes caught a movement from exacty where the Buck had dropped............... after i realised that it was not the same deer to which my heart sank thinking how could this be. a large Muntjac Buck was in front of me 2 meters from the Roe and i dropped him also. in my time on that land of 3 years i shot several Roe and muntjac doubles in the same evening.
THEY DONT READ THE BOOKS, THEY MAKE THE RULES.
Certainly this has been my experience anyway.