Thank you all for your comments - good to hear these from photographers I respect.
The idea behind the photograph was peace and serenity - it is hard to come up with any other idea in such a place. I was concerned that it broke too many rules, but it worked for me and I'm relieved to know that it works for others too.
I smiled at Jeremy's comment that he would have preferred a few clouds. When I went out to make the shot it was still pitch dark and I had no idea what was up there. As the sky began to lighten I saw it was completely clear and I thought to myself "damn, blast and bother, no clouds". But I made the shot anyway. As it happens, a few minutes later the sky began to wisp up, and I attach the resulting shot below. But I actually prefer the first photo (others may differ). I suppose the lesson is to shoot what is there, not what you want to be there, and make the best of it.
Also, the comments about serenity made me smile. Serenity was certainly my intention, but what you don't know is that there was a rather large crocodile in the water just a few feet in front of me. My 12 year old son was with me, as photographers assistant, armed with some large stones to throw at the beast in case it decided to come out of the water for some breakfast. Neither of us was feeling particularly serene at the time!
Ed
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