I HAVE now gone through the definition laid down of a municipal law; and have shewn that it is "a rule--of civil conduct--prescribed--by the supreme power in a state--commanding what is right, and prohibiting what is wrong:" in the explication of which I have endeavoured to interweave a few useful principles, concerning the nature of civil government, and the obligation of human laws. Before I conclude this section, it may not be amiss to add a few observations concerning the _interpretation_ of laws. WHEN any doubt arose upon the construction of the Roman laws, the usage was to state the case to the emperor in writing, and take his opinion upon it. This was certainly a bad method of interpretation. To interrogate the legislature to decide particular disputes, is not only endless, but affords great room for partiality and oppression. The answers of the emperor were called his rescripts, and these had in succeeding cases the force of perpetual laws; though they ought to be carefully distinguished, by every rational civilian, from those general constitutions, which had only the nature of things for their guide. The emperor Macrinus, as his historian Capitolinus informs us, had once resolved to abolish these rescripts, and retain only the general edicts; he could not bear that the hasty and crude answers of such princes as Commodus and Caracalla should be reverenced as laws. But Justinian thought otherwise[k], and he has preserved them all. In like manner the canon laws, or decretal epistles of the popes, are all of them rescripts in the strictest sense. Contrary to all true forms of reasoning, they argue from particulars to generals. [Footnote k: _Inst._ 1. 2. 6.] THE fairest and most rational method to interpret the will of the legislator, is by exploring his intentions at the time when the law was made, by _signs_ the most natural and probable. And these signs are either the words, the context, the subject matter, the effects and consequence, or the spirit and reason of the law. Let us take a short view of them all.