The whole will conclude with considerations of the value of the work, or its practical utility in scientific investigations (especially the first part, which contains the strictly demonstrative reasonings, and the analysis of all the acts and passions of the mind which may be employed to the discovery of truth) in the arts of healing, especially in those parts that contain a catalogue, etc. of probable reasoning; lastly, to the senate, the pulpit, and our law courts, to whom the whole--but especially the latter three-fourths of the work, on the probable and the false--will be useful, and finally instructive, how to form a commonplace book by the aid of this Instrument, so as to read with practical advantage, and (supposing average talents) to 'ensure' a facility and rapidity in proving and in computing. I have thus amply detailed the contents of my work, which has not been the labour of one year or of two, but the result of many years' meditations, and of very various reading. The size of the work will, printed at thirty lines a page, form one volume octavo, 500 pages to the volume; and I shall be ready with the first half of the work for the printer at a fortnight's notice. Now, my dear friend, give me your thoughts on the subject: would you have me to offer it to the booksellers, or, by the assistance of my friends, print and publish on my own account? If the former, would you advise me to sell the copyright at once, or only one or more editions? Can you give me a general notion what terms I have a right to insist on in either case? And, lastly, to whom would you advise me to apply? Phillips is a pushing man, and a book is sure to have fair play if it be his 'property'; and it could not be other than pleasant to me to have the same publisher with yourself, 'but'----. Now if there be anything of impatience, that whether truth and justice ought to follow that "'but'" you will inform me. It is not my habit to go to work so seriously about matters of pecuniary business; but my ill health makes my life more than ordinarily uncertain, and I have a wife and three little ones. If your judgment leads you to advise me to offer it to Phillips, would you take the trouble of talking with him on the subject, and give him your real opinion, whatever it may be, of the work and of the powers of the author? When this book is fairly off my hands, I shall, if I live and have sufficient health, set seriously to work in arranging what I have already written, and in pushing forward my studies and my investigations relative to the 'omne scibile' of human nature--'what' we are, and 'how we become' what we are; so as to solve the two grand problems--how, being acted upon, we shall act; how, acting, we shall be acted upon. But between me and this work there may be death.