Manholes A, B, and C

January 31, 2013 6:01 a.m.

5:52 a.m.

5:54 a.m. This is right.

This is left, to Manhole B.

5:56 a.m.

5:57 a.m.

February 8, 1:49 p.m. Manhole B

1:50 p.m.

1:51 p.m.

The relationship between Manhole B and Manhole C.

February 24, 12:55 a.m.

12:43 a.m.

Now, I regret to tell you, but the steps that ladder down are in opposite directions as from the previous manhole, so left and right seems to be in reverse and causes confusion.

12:45 a.m. Looking right (continued in the unknown direction).

Looking left.

12:46 a.m.

To Manhole C now.

This tunnel is a little bit smaller, and slightly elevated, than the other 1.

12:47 a.m.

12:48 a.m.

12:49 a.m.

12:48 a.m.

12:50 a.m.

12:51 a.m.

12:53 a.m.

Simple map of the place, tunnel length and angle not to scale.