Carmen could make the argument that it was acquired on an independent side adventure. Covenant business was the deal with Cacadackles tower. The cloud-sheep can be considered part of that. This is a new vis source, and Carmen can claim the first year's yield.
The book and egg were acquired during a personal adventure, having chosen to take the long way home and being lucky enough to chance upon Frey's castle and having a successful (and non-fertilizing) personal encounter.
However, the Resolutions do not state that covenant business needs be involved. It simply says:
That's a tricky bit of wording and I don't know why I did that. But there it is.
Now the assets in question are the book and egg together. Carmen is due one-seventh of the value of this fabulous book and an un-hatched phoenix egg. She will propose that the shell fragments with their original vis is fair compensation.