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Maplestone front fork

Looking through some of my late grandfather's literature, I found handwritten references to the Maplestone front fork, plus a poor photo. I don't think this was for a machine he had but rather that of a friend. Neither literature sources nor the internet offer any real help regarding the Maplestone fork, which to me looks like a conventional centre sprung girder front fork. What's the story?

Roger Francis, email, East Anglia.

Your penultimate sentence, Roger, hits the nail on the head:'. .. the Maplestone front fork ... looks like a conventional centre sprung girder front fork.' And although Jew will know of or have seen a Maplestone fork, we'll have seen the design, because it became the well known, widely used Webb girder front