The map appears to be missing, assuming there ever was one. Doesn’t sound difficult, though. (a) caves, (b) twisting, (c) 3 encounter areas.
2) Treasure! Guarded by a Spectre: AC2, MV15/30, HD7+3, hp 35, At1, D1-8, SA: 2 levels, SD: +1 or better to hit, Al: LE.
a. 40,000 cp, 50,000 sp, 16,000 ep, 12,000 gp
b. sword+1, +4 vs. reptiles
c. treasure map 2
f. helm of underwater action
3) Hole which is portal to another cave system in jungle country.