This paper is principally concerned with the life and background of the hitherto obscure Dr. John King. However, in telling his story aspects of Dr. Assuerus Regemorter and, to a lesser extent, Dr. Baldwin Hamey and Dr. George Ent, inevitably appear. Between 1634 and 1648, all these men were admitted as Fellows to the Royal College ofPhysicians ofLondon. During the same period as well, their na...