From the diary of Samuel Pepys (1663-1703)
... and myself to the Popeshead, where all the Houblons were, and Dr. Croone; and by and by to an exceeding pretty supper--excellent discourse of all sorts; and endeed, are a set of the finest gentlemen that ever I met withal in my life. Here Dr. Croone told me that at the meeting at Gresham College tonight (which it seems they now have every Wednesday again) there was a pretty experiment, of the blood of one Dogg let out (till he died) into the body of another on one side, while all his own run out on the other side. The first died upon the place, and the other very well, and likely to do well. This did give occasion to many pretty wishes, as of the blood of a Quaker to be let into an Archbishop, and such like. But, as Dr. Croone says, may if it takes be of mighty use to man's health, for the amending of bad blood by borrowing from a better body. -- Pepys' Diary, 14 Nov. 1666