The determination of the truth at law would succeed much less frequently than it does if it were not for the fact that men find it very difficult to keep secrets. This essentially notable and not clearly understood circumstance is popularly familiar. Proverbs of all people deal with it and point mainly to the fact that keeping secrets is especially difficult for women. The Italians say a woman who may not speak is in danger of bursting; the Germans, that the burden of secrecy affects her health and ages her prematurely; the English say similar things still more coarsely. Classical proverbs have dealt with the issue; numberless fairy tales, narratives, novels and poems have portrayed the difficulty of silence, and one very fine modern novel (Die Last des Schweigens, by Ferdinand Kürnberger) has chosen this fact for its principal motive. The universal difficulty of keeping silence is expressed by Lotze[56] in the dictum that we learn expression very young and silence very late. The fact is of use to the criminalist not only in regard to criminals, but also with regard to witnesses, who, for one reason or another, want to keep something back. The latter is the source of a good deal of danger, inasmuch as the witness is compelled to speak and circles around the secret in question without touching it, until he points it out and half reveals it. If he stops there, the matter requires consideration, for “a half truth is worse than a whole lie.” The latter reveals its subject and intent and permits of defence, while the half truth may, by association and circumscriptive limitations, cause vexatious errors both as regards the identity of the semi-accused and as regards the circumstances with which he is thus involved. For this reason the criminalist must consider the question of secrets carefully.