Book Code for Prime Base

[cosmicfish]

The Teams don't need a code, they need a Shibboleth. The Teams should know 2 things that positively identify Prime Base, then let the Grand Deception reveal one and hide the other. That way, a Morrow Team finding the site would see the first thing, but not finding the second should realize that some part of the facility has not yet been discovered.

For example, perhaps Teams (or at least Team Leaders) are told that PB is the only facility active during the war and is also a repository of art and artifacts. In the base they find plenty of evidence that it is a large Morrow facility and was active during the war, but no Monets. Where are they??