This is a real gem! I came across it after a reader posted a link to a forum of various Kowloon Walled City photos and stories. This cross-section illustration shows just how crowded, cramped, and complicated the old Kowloon Walled City was.
Unfortunately, this scan from a [Japanese?] magazine isn’t any larger. Believe me, if it was, I would so post this cross-section in full resolution. I tried to find the original magazine/scan, but I had no luck.
If anybody has ANY information from where this scan came from, please let me know in the comments!