Thanks... I finally decided to carry on playing from 8.20 ... completed the catacomb by 11.37 (did some Tier III whites in a well... about 5 of them, the well is still there, but did not continue on... the map was crap Rare Tier II with quantity and +3 Warm lights.)

Dimension from 8.20 to 11.37 = 7x8 ... 7 height x 8 width. think that is like 56 squares.