If a man were to have a patch put on his coat, he might properly have it put on the under side of the coat instead of the outer side, thus making what is called “a blind patch,” for the purpose of concealing the defect in his garment.  Even though this course might result in a false impression on the mind of the casual observer, the man would not be blameworthy, as he would be if he had pursued the same course with a purpose of deceiving a purchaser of the coat.  So, again, in the case of a mender of bric-a-brac:  it would be right for him to cement carefully the parts of a broken vase for the mere purpose of concealing its damaged condition from the ordinary eye, but not for the purpose of deceiving one who would be a purchaser.

A man whose city house is closed from the public in the summer season, because of his absence in the country, has a perfect right to come to that house for a single night, without opening the shutters and lighting up the rooms in intimation of his presence.  He may even keep those shutters closed while his room is lighted, for the express purpose of concealing the fact of his presence there, and yet not be responsible for any false impression on the minds of passers-by, who think that the proprietor is still in the country, and that the city house is vacant.  On the other hand, if the house be left lighted up all through the night, with the shutters open, while the inmates are asleep, for the very purpose of concealing from those outside the fact that no one in the house is awake and on guard, the proprietor is not responsible for any self-deception which results to those who have no right to know the facts in the case.

And so, again, in the matter of having a man’s hat or coat on the rack in the front hall, while there are only women in the house, the sole purpose of the action may be the concealment of the real condition of affairs from those who have no claim to know the truth, and not the deliberate deception of any party in interest.  In so far as the purpose is merely the concealment from others of the defenseless condition of the house the action is obviously a proper one, notwithstanding its liability to result in false impressions on the minds of those who have no right to an opinion in the case.

While a man would be justified in concealing, without falsehood, the fact of a bodily lack or infirmity on his part which concerned himself alone, he would not be justified in concealing the fact that he was sick of a contagious disease, or that his house was infected by a disease that might be given to a caller there.  Nor would he be justified in concealing a defect in a horse or a cow in order to deceive a man into the purchase of that animal as a sound one, any more than he would be justified in slightly covering an opening in the ground before his house, so as to deceive a disagreeable visitor into stumbling into that hole.