I learned a lot from Jerry during a spell in MIT in the mid nineteen-fifties, both in the laboratory and in generally knocking around with him and others, especially Brad Howland. I got the sad news of Jerry’s death in a phone call from Brad.
During part of the time at MIT I lived in the Lettvin household and knew David, Ruth and Jonathan as youngsters. I would have liked to tell a story or two to illustrate that crazy but productive time but many incidents come to mind and I haven’t been able to choose. I’ll put some of them into an obituary notice for the journal Kybernetes. In the meantime I send condolences to all, especially Maggie.