Hi again all!
Now I'm in (or back in) room 19504 - I was in here from before (from above), and before i went left to a "Save", I hurdled the rock wall on the right and found this area - nice hidden treat that!. So, i went into the hidden rooms to the right and down (19505, 19705, 19704, and 19703, iirc) - exhausted all the hidden treasures (dead end) and went back to 19504 - can't get in! (see Jack barely into the room bottom right).
Where to!? :P
Thanks,
DLC

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Your Jack is looking in the wrong way. You have to go back just a little. If my memory serves me right you have to climb up to this room in  the image.

Hi Rose,
Thanks for the reply.
Yes, one climbs up to that floor level via the room to the right (hidden ladder-room 19505), which is the way you get down to the hidden rooms. The problem is getting back - if you mean that there is yet another way into room 19504 (from below) then I haven't found it yet.
Thanks again,
DLC

Hi everybody -
I came back from my holidays a couple of days ago, and today is the first time I'm back in the forum.

To answer the question below, dlcatftwin:
Yes - the way out of the hidden rooms is DIFFERENT than the way in.
If you look closely you'll find it.

(I know this answer must come to late - you're obviously not down there any longer, waitin' for someone to tell you how to get out !
But I thought..... there might be other players facing the same "problem" - so I'd give a little advice !)