Here's my rendering of it... The painting is very accurate! That is apparently not a dead end, you can see where it comes out to the left and a couple of openings for light in between
Attachment 40378
Printable View
Here's my rendering of it... The painting is very accurate! That is apparently not a dead end, you can see where it comes out to the left and a couple of openings for light in between
Attachment 40378