Reperius (Thumper's Mage)

This was mentioned before in the old thread here:

Upon further reflection I think it needs to be stipulated that since this is a deal between X and the house (or its representatives - most likely the Exarch in Stonehenge) - if I don't know the details and someone comes to collect, I'll likely insist on confirming with the house about the terms before complying. There could be some prearranged indicator that could indicate sufficiency - a password perhaps.

As usual, let me know if this doesn't work and I need to refine.