First Cut is the Deepest

In researching a novel that's all about perspective, it's good to look for murder weapons that might not resemble conventional weaponry - although, in the C18th, any doctor might do you more harm than good.

FLEAM: a sharp lancet for bloodletting.

SCALPEL: a knife used in surgical dissection.

LANCET: a surgical knife with a short, wide, two-edged blade.