On Thu, 11 Jan 2007 09:44:18 +0000, Adrian Stott <[EMAIL PROTECTED]> wrote:
>It was not the rule during the waterways' freight days. It was >introduced later as a convenience for the navigation authorities (and >an inconvenience for boaters). > Didn't it also have something to do with poorly maintained and leaking gates. So the idea was to close both sets - as one set may be more watertight than the other ???> -- Malcolm
