Anything but traces of unchanged sexual desire we need not expect in Leonardo. These point however to one direction and allow us to count him among homosexuals. It has always been emphasized that he took as his pupils only strikingly handsome boys and youths. He was kind and considerate towards them, he cared for them and nursed them himself when they were ill, just like a mother nurses her children, as his own mother might have cared for him. As he selected them on account of their beauty rather than their talent, none of them--Cesare da Sesto, G. Boltraffio, Andrea Salaino, Francesco Melzi and the others--ever became a prominent artist. Most of them could not make themselves independent of their master and disappeared after his death without leaving a more definite physiognomy to the history of art. The others who by their productions earned the right to call themselves his pupils, as Luini and Bazzi, nicknamed Sodoma, he probably did not know personally. We realize that we will have to face the objection that Leonardo's behavior towards his pupils surely had nothing to do with sexual motives, and permits no conclusion as to his sexual peculiarity. Against this we wish to assert with all caution that our conception explains some strange features in the master's behavior which otherwise would have remained enigmatical. Leonardo kept a diary; he made entries in his small hand, written from right to left which were meant only for himself. It is to be noted that in this diary he addressed himself with "thou": "Learn from master Lucca the multiplication of roots."[40] "Let master d'Abacco show thee the square of the circle."[41] Or on the occasion of a journey he entered in his diary: "I am going to Milan to look after the affairs of my garden ... order two pack-sacks to be made. Ask Boltraffio to show thee his turning-lathe and let him polish a stone on it.--Leave the book to master Andrea il Todesco."[42] Or he wrote a resolution of quite different significance: "Thou must show in thy treatise that the earth is a star, like the moon or resembling it, and thus prove the nobility of our world."[43] In this diary, which like the diaries of other mortals often skim over the most important events of the day with only few words or ignore them altogether, one finds a few entries which on account of their peculiarity are cited by all of Leonardo's biographers. They show notations referring to the master's petty expenses, which are recorded with painful exactitude as if coming from a pedantic and strictly parsimonious family father, while there is nothing to show that he spent greater sums, or that the artist was well versed in household management. One of these notes refers to a new cloak which he bought for his pupil Andrea Salaino:[44] Silver brocade Lira 15 Soldi 4 Crimson velvet for trimming " 9 " 0 Braid " 0 " 9 Buttons " 0 " 12