Is 'he' or isn't 'he'?

So...here was Jnr emerging last night'He' found the only place we haven't managed to seal up yet because we ran out of  fibreboard.This morning 'he' was back just before dawn and in his frustration resorted to force and attempted vandalism to try and get into his usual sleeping spot on the eastern side of the roof. It sounded like 'he' was scratching or chewing his way in...but he failed and headed over to the  western side where he had managed to get in last night. There were more scrabblings about before a loud 'thud' and then silence......I think 'he' fell down onto the deck. I was half expecting to find a dead possum lying there this morning but nothing....no trace. Surely if you spend most of your life in a tree you must be able to survive a few tumbles. So...is 'he' or isn't 'he' sleeping in the roof again, or is 'he' or isn't 'he' in Possum hospital?