The Inventory which was to have been inserted in the 10th chapter of VALERIUS TERMINUS is thus introduced:--"The plainest method and most directly pertinent to this intention will be to make distribution of SCIENCES, ARTS, INVENTIONS, WORKS, and their portions, ACCORDING TO THE USE AND TRIBUTE WHICH THEY YIELD AND RENDER TO THE CONDITION OF MAN'S LIFE; and under those several uses, being as several offices of provisions, to charge and tax what may be reasonably exacted or demanded,... and then upon those charges and taxations to distinguish and present as it were in several columns what is extant and already found, and what is DEFECTIVE AND FURTHER TO BE PROVIDED. Of which provisions because in many of them, after the manner of slothful and faulty accomptants, it will be returned by way of excuse that no such are to be had, it will be fit to give some light OF THE NATURE OF THE SUPPLIES; whereby it will evidently appear that they are to be compassed and procured." And that the calendar was to deal, not with knowledge in general, but only with arts and sciences of invention in its more restricted sense--the PARS OPERATIVA DE NATURA (DE AUG. iii. 5.)--appears no less clearly from the opening of the 11th chapter, which was designed immediately to follow the "Inventory." "It appeareth then what is now in proposition, not by general circumlocution but by particular note. No former philosophy," etc. etc. "but the revealing and discovering of NEW INVENTIONS AND OPERATIONS,... the nature and kinds of which inventions HAVE BEEN DESCRIBED as they could be discovered," etc. If further evidence were required of the exact resemblance between the Inventory of VALERIUS TERMINUS and the Inventarium of the ADVANCEMENT and the DE AUGMENTIS, I might quote the end of the 9th chapter, where the particular expressions correspond, if possible, more closely still. But I presume that the passages which I have given are enough; and that the opinion which I have elsewhere expressed as to the origin of the ADVANCEMENT OF LEARNING,--namely, that the writing of it was a by-thought and no part of the work on the Interpretation of Nature as originally designed,--will not be considered inconsistent with the evidence afforded by these fragments. That the VALERIUS TERMINUS was composed before the ADVANCEMENT, though a conclusion not deducible from the Inventory, is nevertheless probable: but to suppose that it was so composed EXACTLY IN ITS PRESENT FORM, involves, as I said, a difficulty; which I will now state. The point is interesting, as bearing directly upon the developement in Bacon's mind of the doctrine of Idols; concerning which see preface to NOVUM ORGANUM, note C. But I have to deal with it here merely as bearing upon the probable date of this fragment.