This next job was a bit easier.  Despite the rain having made all the handholds slippery and it being an unfamiliar climb in the near dark, I was able to take my time and easily find a high vantage point overlooking the wall.  Below me I could see points of light moving about on top of the wall.  That would be the guards on patrol, on the lookout for people like me crazy enough to tr to scale the wall.

I settled down to wait.