Is this the first ever photograph of the Forth Bridge?
Taken eight years before its completion, and signed and dated by the designer Sir Benjamin Baker in May 1882, it is a photograph of the model he used to demonstrate his amazing, innovative design to a specially appointed parliamentary committee. They were impressed, as we all know, and the rest is history - it has become one of the most iconic structures in the world.
And that's not all... on the back of the photo is a pencil sketch, presumably in Baker's hand, demonstrating the theory of the cantilever principle. You can even imagine him drawing it for the Prime Minister. Absolutely amazing.
I am thrilled to have purchased this, and I'll be devastated when I sell it - a sentiment the bank manager just won't understand!