I think that is an error in the wording of the manual. There is a contingency page, but it doesn't list spell triggers. You can view your contingencies by opening up your spell book, and clicking on the "Contingency" button on the bottom.
The manual implies that you can also view Spell Triggers the same way, you can't. You pretty much have to remember on your own what you have in your triggers.
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"This place will be your tomb."