express covenants after an assignment by him; but not on implied ones; 4 Term 98; but he is liable to the assignee of the lessor on implied covenants, at common law; Platt, Cov. 532; 2 Sugd. Vend. 466; Burton, R. P. § 855. See 1 Washb. R. P. 526. In case of the assignment of lands in par- cels, the assignees may recover pro rata, and the original covenantee may recover according to his share of the original estate remaining; 2 Sugd. Vend. 508; Rawle, Cov. § 215; 36 Me. 170; 27 Pa. 288; 3 Metc. Mass. 87; 8 Gratt. 407; 9 B. Monr. 58. But covenants are not, in general, apportion- able; 27 Pa. 288. See Spencer's case, 1 Sm. Lead. Cas. 206. In Practice. A form of action which lies to recover damages for breach of a contract under seal. It is one of the brevia formata of the register, and is sometimes a concurrent remedy with debt, though never with assumpsit, and is the only proper remedy where the damages are unliqui- dated in nature and the contract is under seal; Fitzh. N. B. 340; Chit. Pl. 112, 118; 2 Steph. N. P. 1058. The action lies, generally, where the covenantor does some act contrary to his agreement, or fails to do or perform that which he has undertaken; 4 Dane, Abr. 115; or does that which disables him from per- formance; Cro. Eliz. 449; 15 Q. B. 88; 23 Pick. 455. To take advantage of an oral agreement modifying the original covenant in an es sential point, the covenant must be aban- doned and assumpsit brought; 27 Pa. 429; 24 Vt. 347. The venue is local when the action is founded on privity of estate; 2 Steph. N. P. 1148; 1 Wms. Saund. 241 b, n.; and transitory when it is founded upon privity of contract. As between original parties to the covenant, the action is transitory; and, by the statute 32 Hen. VIII. c. 34, an action of covenant by an assignee of the reversion against a lessor, or by a lessee against the assignee of the reversion, is also transitory; 1 Chit. Pl. 274. The declaration must, at common law, aver a contract under seal; 2 Ld. Raym. 1536; and either make profert thereof or excuse the omission; 3 Term 151; at least of such part as is broken; 4 Dall. 436; 4 Rich. 196; and a breach or breaches; 15 Ala. 201; 5 Ark. 263; 4 Dana 381; 6 Miss. 229; which may be by negativing the words of the covenant in actions upon cove- nants of seisin and right to convey; Rawle, Cov. § 176; or according to the legal effect; but must set forth the incumbrance in case of a covenant against incumbrances; id. § 86; and must allege an eviction in case of warranty; id. § 155. The disturb- ance must be averred to have been under lawful title; id. Noconsideration need be averred or shown, as it is said to be implied from the seal; but performance of an act which constitutes a condition precedent to the defendant's covenant, if there be any such, must be averred; 1 Chit. Pl. 116; 2 Greenl. Ev. § 235; 26 Ala. N. S. 748. The damages laid must be large enough to cover the real amount sought to be recovered; 3 S. & R. 364, 567. There is no plea of general issue in this action. Under non est factum, the defend- ant may show any facts contradicting the making of the deed; 1 Seld. 422; 1 Mich. 438; as, personal incapacity: 2 Campb. 272; that the deed was fraudulent; Lofft 457; was not delivered; 4 Esp. 255; or was not executed by all the parties; 6 Maule & S. 341. Non infregit conventionem and nil debet have both been held insufficient; Com. Dig. Pleader, 2 V, 4. As to the effect of cove nant performed, see COVENANTS PERFORMED. In respect to the damages to be recovered, see DAMAGES. The judgment is that the plaintiff recover a named sum for the damages which he has sustained by reason of the breach or breaches of covenant, together with costs. Sec INDEPENDENT COVENANT.