A1: Looking up the entrance pitch.
A2: Alf surveying at the head of pitch 2. A3: Looking down pitch 2.
A4: Alf entering head of pitch 2.
A5, B1: Alf on pitch 2. B2: Looking up pitch 2.
B3,4,5: Looking from base pitch 2 to head of pitch 3, Alf surveying.
C1: Looking down pitch 3. C2: Alf ascending pitch 4.
C3: Passage leading off from head of pitch 4.
1
2
3
4
5
A
B
C
