An action based upon the breach of a contract. They are classified as covenant, debt, assumpsit, detinue, and account. Covenant lay where the party claimed damages for a breach of contract or promise under seal. Debt lay for the recovery of a liquidated debt. Assumpsit was an action to recover damages arising out of a breach of contract or to recover a debt. An undertaking either express or implied, to perform a parol agreement. Detinue was a claim for the specific recovery of goods, chattels, deeds, or writings.