Missing traps/haunts in Return of the Runelords Book 2 (Hollow Mountain)

I made my first purchase of a Roll20 version of an AP, and I'm mostly happy with it. But where are the descriptions for the traps/haunts? Repeatedly, the room descriptions say, "this-or-that will trigger the trap." But there's no explanation of what the trap actually does.  Or it says there's a haunt.  What type? It doesn't say. Are the trap/haunt descriptions someplace that I haven't thought to look? Is it an oversight that can be fixed?

Hey Nuk, I'll see if I can figure this out. First guess is there might be either a Handout, or a Rollable Table(s), that describes the Traps. I'll be able to research this more closely to try to get a definitive answer.

Nuk, I found the answer. The traps and haunts are described in the Chat-output when you roll the MACRO that is associated with that Room/Location. To understand this most easily --- go into Journals tab above chat > Handouts > open a Handout called "Macros and Rollable Tables" that came with the product. This handout contains an Index or List of all the times you'll need to roll a Macro button. It happens about 20 times throughout the AP, and roughly 3+ of those are Traps and 3+ of them are haunts. The other macros have different types of information that's just-as-useful and you'll need them as you progress through the AP. The handout is indexed in-order of the AP, and tells you which macro is needed in which chapter.  To actually roll the macros -- go to the Collection tab above chat > look under MACROS > you can press the little 20-sided dice icon next to each Macro to roll it into Chat. Now flip to your chat and read the output. There is the trap-or-haunt description.  Campaign Survey report: 86 characters with total  59365 attributes 12 pages,  10 have dynamic lighting 360 graphic objects 184 handouts 20 macros 3 rollable tables 0 jukebox tracks

Thank you very much for the detailed answer.  I'd never used macros or that "collections" tab before, but I've found them now.