4th part of Lost Caverns of Tsojcanth question?

[Tobus Neth]

Where in the greater caverns is the entrance to the Hollow of the Horn?
Please help?

[Tzzarg]

Spoiler alert
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If you look on page 50 under the description of the Inner Sphere of the Greater Caverns, it says that if you do a successful spot check and then a strength check on the bottom of the bier that Drelzna is initially resting on, you can lift the heavy stone "bottom" and find the beginning of a circular stairway that goes 500 feet down to the beginning area of the Horn.

[Tobus Neth]

Thanks Tzzarg!