"Of course." Anton came back with rolls of blueprints and a large notebook, with pencils and eraser--there were more of them in the Hotel than there were pens. Too much of what Anton did was liable to be amended, updated or outright erased to be lacking in lead.

Callaghan relaxed significantly in that short space of time, Anton noted. A man who not merely enjoyed hard work, but delighted in it. Anton appreciated that. He let his footsteps sound as alert to his presence and came to Callaghan's side, putting the notebook and pencils on the floor beside Callaghan and then finding one specific blueprint.

"This is the schematics for the mechanics," he said, shaking it out and placing it down. "The stapled pages are the changes Professor Grouse made as technology became more refined--the most recent is on top. These notes--" He pointed at several bracketted number sequences written in a different coloured ink. "--indicate corresponding blueprints for the magical elements of the machine."