Thank you so much for the cultures and the letter commenting on them. I am very grateful to you for your generosity. If you
will let me know your travel plans this spring, I will see if we cannot arrange a formal invitation for a lecture here that
might help cover your travel expense. In any case I will be happy to see you.
I was pleased to have your opinions on the other questions. However, I must admit that I was distressed that you should distinguish
between "virus-like" and "plasmid-like", since the only point of introducing plasmid as a new term was to
avert such distinction.