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322 duly consummated his part in the transaction must, on the contrary, have stood in peculiar favour; and nothing would seem more natural than to arm him with stringent facilities for enforcing the completion of a proceeding which, of strict right, ought never to have been extended or deferred.

Nexum, therefore, which originally signified a Conveyance of property, came insensibly to denote a Contract also, and ultimately so constant became the association between this word and the notion of a Contract, that a special term, Mancipium or Mancipatio, had to be used for the purpose of designating the true nexum or transaction in which the property was really transferred. Contracts are therefore now severed from Conveyances, and the first stage in their history is accomplished, but still they are far enough from that epoch of their development when the promise of the contractor has a higher sacredness than the formalities with which it is coupled. In attempting to indicate the character of the changes passed through in this interval, it is necessary to trespass a little on a subject which lies properly beyond the range of these pages, the analysis of Agreement effected by the Roman jurisconsults. Of this analysis, the most beautiful monument of their sagacity, I need not say more than that it is based on the theoretical separation of the Obligation from the Convention or Pact. Bentham and Mr. Austin have