Looking for something else in the British Library, I came upon the map
index, looked for Lancashire and saw a reference to the canal at
Castlefield. This was in a book by German engineer and cartographer Johann
Ludwig Hogreve, dedicated to George III; the Library has two versions, an
1777 original handwritten and a later printed version. Both have a series of
fold-out plates, not quite identical, and the original is in colour, showing
plans, elevations and sections of engineering works on canals.
Among them is Castlefield, showing the "clover-leaf" overflow into the
Medlock and the underground culverts. But what really took my eye was the
aqueduct at Brinklow. The guides say the arches at the Brinklow aqueduct
have been filled in to make an embankment, but Hogreve's sketch showed an
aqueduct (30' feet high and 30' wide) with two open arches - and the rest of
the arches filled with two-storey houses and stables.
I'm afraid I didn't read the text (in Gothic script German) to understand
more.
Any historians clued up?
Steve
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