David Silver wrote (official) lyrics to the tune made by Ian MacLachlan. The lyric you give above was written by Stewart Ross. As I've said, all the necessary information is available in earlier discussions. If I had started this thread, I'd do a proper digest of all that; I didn't (and don't much care for any of the lyrics anyway) but if somebody has to do it and you don't want to, I suppose I will feel obliged to. Not today, though.