By a recognized test, a weapon is concealed if it is so situated as not to be discernible by ordinary observation by those near enough to see it if it were not concealed who would come into contact with the possessor in the usual associations of life, but absolute invisibility is not required; since ordinary observation does not extend to a search unusually careful, thorough or detailed, made because of suspicion that contraband which is not visible by ordinary observation may in actuality be present.
In the case of a knife, moreover, its handle is most assuredly a part of the weapon, just as the handle of a revolver or a rifle is a part of the weapon. A knife is not ipso facto concealed because its blade is in its sheath, any more than a six-gun is concealed because its barrel is in the holster or a sword concealed because its blade is in the scabbard. Though drawing an inference, perhaps, the reasonable observer knows when he has seen a knife
, a six-gun, or a sword. Concealment "should be made of sterner stuff."