April 5, 1941
Dear Michael:
First of all let me thank you for all the kindness you showed us during our stay in New York.  It was indeed an experience to be with a group at a meeting where the bell did not ring while a paper was being read.  We thoroughly enjoyed those live days.
Pillemer and I were the first to appear at your home, and in conversation with Mrs. Heidelberger the coffee pot became the main topic of interest.  She will tell you that Java coffee is a rare delicacy and the reason why it is.  I found a few ounces of the real thing at home and I have sent it to her.  You will have to burn it for her until it is brown, this with frequent stirring.  It will be the last batch I will ever get since my friend who was Governor of the island of Timor got himself in trouble politically.
Concerning the new nomenclature, we are in complete agreement with you and suggest that you make the changes in your manuscripts.  We have written a note which will be offered to Science for publication; in this note we present the electrophoretic diagrams of mid-piece, end-piece as prepared by the older methods and of ammonia-treated and zymin-treated serums.  We also state in the note that the older terminology is unsatisfactory and mis-leading, and propose the symbols for the components which we now agree on.  It is stated further in the note that the nomenclature was arrived at in complete collaboration and agreement with yourself.
With best regards to Mrs. Heidelberger and to you,
Cordially yours,
Enrique