[Footnote: VASARI repeatedly states, in the fourth chapter of his _Introduzione della Scultura_, that in preparing to cast bronze statues horse-dung was frequently used by sculptors. If, notwithstanding this, it remains doubtful whether I am justified in having introduced here this text of but little interest, no such doubt can be attached to the sketch which accompanies it.] 715. METHOD OF FOUNDING AGAIN. This may be done when the furnace is made [Footnote: this note is written below the sketches.] strong and bruised. Models for the horse of the Sforza monument (716-718). 7l6. Messer Galeazzo's big genet 717. Messer Galeazzo's Sicilian horse. [Footnote: These notes are by the side of a drawing of a horse with figured measurements.] 718. Measurement of the Sicilian horse the leg from behind, seen in front, lifted and extended. [Footnote: There is no sketch belonging to this passage. Galeazze here probably means Galeazze di San Severino, the famous captain who married Bianca the daughter of Ludovico il Moro.] Occasional references to the Sforza monument (719-724). 719. Again, the bronze horse may be taken in hand, which is to be to the immortal glory and eternal honour of the happy memory of the prince your father, and of the illustrious house of Sforza. [Footnote: The letter from which this passage is here extracted will be found complete in section XXI. (see the explanation of it, on page 2).] 720. On the 23rd of April 1490 I began this book, and recommenced the horse. 721. There is to be seen, in the mountains of Parma and Piacenza, a multitude of shells and corals full of holes, still sticking to the rocks, and when I was at work on the great horse for Milan, a large sackful of them, which were found thereabout, was brought to me into my workshop, by certain peasants. 722. Believe me, Leonardo the Florentine, who has to do the equestrian bronze statue of the Duke Francesco that he does not need to care about it, because he has work for all his life time, and, being so great a work, I doubt whether he can ever finish it. [Footnote: This passage is quoted from a letter to a committee at Piacenza for whom Leonardo seems to have undertaken to execute some work. The letter is given entire in section XXL; in it Leonardo remonstrates as to some unreasonable demands.] 723. Of the horse I will say nothing because I know the times. [Footnote: This passage occurs in a rough copy of a letter to Ludovico il Moro, without date (see below among the letters).] 724. During ten years the works on the marbles have been going on I will not wait for my payment beyond the time, when my works are finished. [Footnote: This possibly refers to the works for the pedestal of the equestrian statue concerning which we have no farther information in the MSS. See p. 6.] The project of the Trivulzio monument. 725. THE MONUMENT TO MESSER GIOVANNI JACOMO DA TREVULZO. [2] Cost of the making and materials for the horse [5].