scantiness of the attention which has been given to the difference between Western ideas and Eastern, between Western theology and Eastern, caused by the presence of a new ingredient. It is precisely because the influence of jurisprudence begins to be powerful that the foundation of Constantinople and the subsequent separation of the Western Empire from the Eastern, are epochs in philosophical history. But continental thinkers are doubtless less capable of appreciating the importance of this crisis by the very intimacy with which notions derived from Roman Law are mingled up with every-day ideas. Englishmen, on the other hand, are blind to it through the monstrous ignorance to which they condemn themselves of the most plentiful source of the stream of modern knowledge, of the one intellectual result of the Roman civilisation. At the same time, an Englishman, who will be at the pains to familiarise himself with the classical Roman law, is perhaps, from the very slightness of the interest which his countrymen have hitherto taken in the subject, a better judge than a Frenchman or a German of the value of the assertions I have ventured to make. Anybody who knows what Roman jurisprudence is, as actually practised by the Romans, and who will observe in what characteristics the earliest Western theology and philosophy differ from the phases of thought which preceded them, may be safely left to pronounce what was the new element which had begun to pervade and govern speculation. The part of Roman law which has had most extensive influence on foreign subjects of inquiry has been the law of Obligation, or what comes nearly to the same thing, of Contract and Delict. The Romans themselves were not unaware of the offices which the copious and malleable terminology belonging to this part of their system might be made to discharge, and this is proved by their employment of the peculiar adjunct _quasi_ in such expressions as Quasi-Contract and Quasi-Delict. "Quasi," so used, is exclusively a term of classification. It has been usual with English critics to identify the Quasi-contracts with _implied_ contracts, but this is an error, for implied contracts are true contracts, which quasi-contracts are not. In implied contracts, acts and circumstances are the symbols of the same ingredients which are symbolised, in express contracts, by words; and whether a man employs one set of symbols or the other must be a matter of indifference so far as concerns the theory of agreement. But a Quasi-Contract is not a contract at all. The commonest sample of the class is the relation subsisting between two persons one of whom has paid money to the other through mistake. The law, consulting the interests of morality, imposes an obligation on the receiver to refund, but the very nature of the transaction indicates that it is not a contract, inasmuch as the Convention, the most essential ingredient of Contract, is wanting. This word "quasi," prefixed to a