Tok blinked, and looked up at the human now addressing her... and she smiled. Someone who understood the numbers! The notebook was small, but then, she had small hands. "Oh, thanks! I tell you, all this? I've spent my 'ole life workin' with metal an' learning how t'make clockworks an' elemental engines an' such. But this..." She gestured helplessly at a section of wing. "D'you know what metal that is? Well, actually it's an alloy, there's bits of manganese an' zinc in, but most of it's aluminium. Aluminium! I've seen aluminium spoons in them posh hotels up Skyway, but they've only build a bleedin' airship out'f it. How d'you get that much aluminium? Buggered if I know, but I mean t'find out!"

She was already scribbling again, diagrams and figures and compositions of materials- "Are you an engineer, by trade? There ain't many folk who'd know trig-o-nometry, just by sight."