It’s very difficult to remember what you thought at the time but it so happened that my son was away at a boarding school then, he must have been a… well, I can work out how… how old he was, he would be about 13, 12 perhaps, and so I wrote him a letter saying I thought… think we’ve got something important. So, we did know… we did think it was going to be important but we… there was a reservation… you know, did we really have it right? And when we saw the… the data from the experimentalists in King’s College, London - Rosalind Franklin, Maurice Wilkins, for example - we were more encouraged because it fitted very well with what we’d proposed. So, that was the first step but it then took quite some time. And then, of course, what the idea was the replication mechanism, and the replication mechanism had to be established by quite different types of experiments which… which weren’t done until the late ’50s, so… so it did… it did take some time.