4 



usual with men to compare small things with great. Here, at 

 all events, best of Princes, placed as you are on the pinnacle of 

 human affairs, you may at once contemplate the prime mover in 

 the body of man, and the emblem of your own sovereign power. 

 Accept therefore, with your wonted clemency, I most humbly 

 beseech you, illustrious Prince, this, my new Treatise on the 

 Heart ; you, who are yourself the new light of this age, and 

 indeed its very heart ; a Prince abounding in virtue and in 

 grace, and to whom we gladly refer all the blessings which 

 England enjoys, all the pleasure we have in our lives. 



Your Majesty 's most devoted servant, 



WILLIAM HARVEY. 



[LONDON .... 

 1628.] 



