Um... I may have hijacked the thread a bit -- but I stand by my answer. The common consensus among those who thought about such things at the time, in the late 18th Century, was that natural law and natural rights did exist, though not in the sense in which they are often spoken of by the Radical Right today.
There exists in Latin (universally known by the educated then) a verb form known as the gerundive, used in the passive periphrastic construction. The significance of this verb form and construction was to say in a word what was proper, what ought to be done. A good example is the final word in the phrase abbreviated Q.E.D. used at the end of proofs -- the full phrase is quod erat demonstrandum -- "which was (properly set) to be demonstated."
The attitude was: These rights exist, are inherent in the condition of being human and part of an organized society. The proper role of government is to recognize, guarantee, and defend those rights. If, Jefferson went on to say, a government fails to do so, as George III's Government under Lord North was failing to do for the American colonies, then the proper course for society to take is to turn out such a government and replace it with one which will do its proper job. The whole Declaration is at the same time a statement of defiance to the British Government of the day and a carefully crafted, logical argument founded on universally held principles as to why that course was in fact proper.
But to get back to the basic question -- the Rights of Man, as understood then and now, are not subject to enumeration. Rather, they derive from the concept of liberty -- that a free individual has the right to do whatever he lists within the bounds of the society in which he lives. And the limits to liberty are, interestingly, those of the Golden Rule, in its negative formulation: Whatsoever you would desire not be done to you, do not do the same unto others.
Don't want to be shot and killed? Then don't shoot and kill others. Don't want to be stolen from? Then don't steal from others. Don't want someone to sneak in and seduce your wife? Then don't do it to someone else's wife. Want to be able to go places freely without being assaulted? Then don't bully and assault others. Wish to worship God in the way you feel proper -- or not, if you so choose? Then accord others the same right. Wish to be able to marry the person you love? Then allow others to do so as well with the person they love. And so on. It's not a shopping list of specific rights, it's a formulary for living together in a society as free people.