L. R. 7 App. Cas. 795, 801, 806), and the mutual rights cancel each other pro tanto as they arise, just as in an account current, as distinguished from set-off, then it might be contended that the claim in respect of the payment of damage to cargo is an item in the same account with the one for damage to the ship, and that a decree as to one involves a disposition of the other, and makes the whole