Ishmael faces one of those hard decisions once again...

Stay here, take out the guard and find out right now whats in those boxes that they were so desperate to hide that even the whole place is protected from scrying... or head back upstairs and pretend everything is fine.

The second option seems best but on the other hand even then its not as if they wont suspect him... most likely they would think he is working with an accomplice or something similar given that the coordinator of this place has his mind set that 'the merchant' is a fake.

In the end he decides to play it cautiously hoping it wont come back to bite him in the... behind.

Using his supreme stealth he approaches the leader and walks just behind him and trying to stay outside his field of vision in case he is still detecting magic. As such he should be able to follow him outside before the door is shut.

Then once they are within sight of his office Ishmael will use the ability of the shadow cloak, (the jump) twice if necessary to enter the room first and assume his previous appearance, and pretend to be looking out a window.