In Mora
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
In default; literally, in delay. In the civll law, a borrower who omits or refuses to return the thing loaned at the proper time is said to be in mora.
Story, Bailm. §§ 254, 259.
In Scotch law
A creditor who has begun without completing diligence necessary for attaching the property of his debtor is said to be in mora.
Bell.