Excellent report I really enjoyed reading it although I did wonder who the Aussie was writing the story, decided it must be Cobber Doug after all.
Scenery is spot on, the fence is good but the walls with the tile parapet are ace. I bought some small squares of pasta a few years ago intending to try and make this type of wall, I must try and find the pasta, if the rats haven't eaten it. Are your walls commercial ones?
Hopefully you will be able to make it into the attic and back, try and pace yourself.
Are you using the same make of giant rat that the Mad Lord keeps as pets in the cellar of Snapcase Hall, they look suitably ferocious, I might need to buy some of them myself.
Off up the ladder as quick as you like, I think you're on a roll with this series of stories.
Cheers