From Fallen London Wiki
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<a href="/wiki/File:Roof-background.jpg" title="File:Roof-background.jpg">File:Roof-background.jpg</a> for the blank map, and <a href="/wiki/File:Roof-background_1.jpg" title="File:Roof-background 1.jpg">File:Roof-background_1.jpg</a> for the one with the overlay that we have so far.