Grey Walter in America with his own #6 from the batch of 6 made by "Bunny" Warren of the BNI for the 1951 Festival of Britain. The machine in front is CORA (MkII), the desktop demonstration model. As suggested by others, I do not believe the desktop model of CORA was ever wired into a Machina Speculatrix tortoise. It was a very much self-contained and separate from the tortoises.
I believe the CORA (MkI) (possibly in the image below) was probably "Elmer" converted by adding the additional reflex circuits. The seemingly black holes are clear sections in the painted plastic shell and were probably there to see the neon lamps operating as part of the additional circuit.
At one stage, there were two circuits added, each tuned to a different note from a UK police whistle (which could produce two notes separately or together. When sounded together, this is when the so-called neurosis kicked in, eventually solved by a technique favoured by Walter, leucotomy (labotomy), in this case by cutting out the additional circuits, turning CORA (a machina docilis) back into ELSIE (a machina speculatrix).
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