Stephen’s name was well-known to me years ago in connection with wave-energy and his wonderful and super-efficient ‘ducks’. But much more recently, a developing interest on my part in the technology of Marine Cloud Brightening and its huge potential, led me very naturally to his door. While Stephen was always fair and modest in his acknowledgement of major early contributors to the field like Sean Twomey and John Latham, it strikes me now that it is Stephen himself who is the overarching architect and champion of this technology. And, incidentally, I truly believe that this technology could be the key to saving our planet! I have been fortunate enough and privileged enough to have had ongoing communication with Stephen about many aspects of this technology since the summer of last year. While I was a mere layman and novice to the field, he was greatly generous with his time as I sought to grapple with the most important concepts. And I got the chance to meet him in person too, at his home. My sense of him was that here was a man on the one hand both kindly and down-to-earth, on the other hand, quite clearly nothing less than a great and unique visionary. Alf Thomé 17th April 2024