Our covenant has stumbled across a vast golden treasure, which presents a significant physical and social problem.
The basics: An companion of the covenant and regular guest found a body in a collapsed mine (she got in there by another route); the corpse had metal ingot. The ingot had some markings, which intrigued her, and she consulted the magi. The magi quickly discovered the ingot was gold; investigation follows, a large amount of gold is found, and a ghost reveals that this gold was due to and property of a particular (long extinct) mundane authority. The ghost charges us to deliver the gold to the mundane authority, or haunting and curses upon us.
OK, so on a mundane level, this is a treasure trove. Some very basic research indicates that a trove, under Roman law (we're in Romantic lands and this was originally a Roman trove) is the property of the finder if on their own land, and half if on another's land. The property issue is murky; let's go with Found on Another's Land.
These are not currently Roman-ruled lands, though. The medieval law may be different. Is there any ArM guidance buried in the text?
I don't see that the Order would find any objection to this; we aren't interfering and I don't see how we can be considered to be causing ruin - we didn't find it magically and we didn't create it, and no other magi are as yet involved.
Technically, of course, the first ingot is clearly the companion's - she is due a share of it. The rest was a covenant effort, so shares around, but is that half of the share to the companion and half to the covenant or one share to each mage and one to the companion?
Of course, the amount of gold found will probably bring trove hunters and various other problems, even if we're quiet about it, including armed noble pests and claimants, but those are problems for later. This isn't exactly Monty Haul. There will be consequences, and so far I haven't even gotten to the supernatural pests likely to show up.