Always interesting, what people dump. I found a full set of Whitworth open end wrenches on the top layer of a (lidless) garbage can in the neighborhood, back when we had a dog to walk daily. My brother's been equipped to restore an older British car ever since.
At the very least, had I been that family, I'd have found the metal recycling bucket. But I'm glad they left the set where I could find it.
Nice finds.