Thanks, Gordon!
I used a local streetlight to focus. I thought it was far enough away to be set to infinity. Perhaps it wasn't. The aperture was around F4-6 (certainly no more than that). Perhaps the buckle you mention was caused by the wind. The tripod seemed steady to me, though. But, it was strong enough to push me back, once or twice.
A week ago I didn't know anything about aperture, exposures etc.. It's been a fast-track learning curve.
Thanks, Mate! I appreciate your help
I would like to say how much I have enjoyed seeing everyone's pics. They are magnificent!
~ Bruce