The following chapters are an attempt to state, in systematic form, the most characteristic part of the most characteristic intellectual product of Rome. There is scarcely a problem which can present itself, in any branch of the law, the solution of which may not be affected by the fact that one of the parties to the transaction is a slave, and, outside the region of procedure, there are few branches of the law in which the slave does not prominently appear. Yet, important as the subject is, for the light it might be expected to throw on legal conceptions, there does not exist, so far as I know, any book which aims at stating the principles of the Roman Law of slavery as a whole. Wallon's wellknown book covers so much ground that it cannot treat this subject with fulness, and indeed it is clear that his interest is not mainly in the law of the matter. The same is true of Blair's somewhat antiquated but still readable little book.

But though there exists no general account, there is a large amount of valuable literature, mostly foreign. Much of this I have been unable to see, but without the help of continental writers, chiefly German, I could not possibly have written this book. Indeed there are branches of the subject in which my chapters are little more than compilation. I have endeavoured to acknowledge my indebtedness in footnotes, but in some cases more than this is required.