244 JEROME CARDAN. 



so that I have not had time to reflect upon your other 

 propositions. 



I pray you, at any rate, to send or bring me what re- 

 mains of your thirty deductions which you gave to Master 

 Antonio Maria. If you will also send me some solutions 

 of your two rules, or will give them to me when you come, 

 I shall be in the highest degree obliged ; for you must 

 know that I take pleasure in all courtesy, and that I have 

 sent to press a work entirely on the practice of Geometry, 

 Arithmetic, and Algebra, of which up to this date more 

 than the half is printed, and if you will give them to me 

 so that I may publish them in your name, I will publish 

 them at the end of the work as I have done with all others 

 who have given to me anything of value, and will there 

 put you down as the discoverer, and if you wish me to 

 preserve your secret, I will do as you desire. 



I told the lord marquis 1 of the instruments you had 



1 "Io avisai la eccellentia del Signer Marchese de gli istromenti 

 quali gli mandati (anchor che non siano per fina hora gionti) et li dissi 

 del cartello, e sua eccellentia mi commando lo legesse e tutte queste 

 uostre cose piacque grandamente a sua eccellentia. Et mi commando di 

 subito ui scriuesse la presente con grande istantia in nome suo, auisan- 

 doui che uista la presente douesti uenir a Millano senza fallo che 

 uoria parlar con uoi. Et cosi ue esorto a douere uenire subito, et 

 non pensarui su, perche ill detto Signer Marchese e si gentil remune- 

 ratore delli uirtuosi, si liberate, et si magnanimo che niuna persona 

 chi serue sua excellentia mentre sia da qualche cosa resta discontenta. 

 Si che non restati de uenire e uenereti a logiare in casa mia non altro 

 Christo da mal ui guardi alii. 13. di Marzo, 1539. Hieronimo Cardano, 

 medico." To which Tartalea subscribes: "Per costui son ridutto a 



