"Perhaps there should be some kind of test," Holmes comments thoughtfully. "And a practical examination as well."
"So you would be unlikely to 'set off' your wand if you tripped or dropped it?" He looks keenly at Severus. "No," Holmes laughs. "I thought the trees would make excellent targets. Very forgiving, trees." Understanding dawns. His chromatograph is still down for repairs from the tests run with it. "I apologise for the misunderstanding. No electricity is involved. Merely compressed air. If you do want to know something of gunsmithing, I know of a chap is Edinburgh who does splendid work."
Calling it a derringer sounds ever so dashing and Errol Flynn-ish. Whereas a bodice-dagger sounds like something you'd need to fend Errol off! ;) S'ok. We're off to Columbus this afternoon and won't be back until late. May or may not reply this evening.