Apothecaries' Hall Act, 1791

Persons buying and selling less than 1 lb. of arsenic, to enter and sign as herein,

arsenic not to be sold to persons not known,

penalty 20l.

XXX. And be it further enacted by the authority aforesaid, That every apothecary, druggist, or other such person selling any quantity less than one pound weight of arsenic, shall at the time of such sale, and before delivering, enter in a book to be kept for that purpose, the quantity sold, and the time when it was so sold, to which entry the person buying shall sign his or her name, addition and place of abode; or in case such person so purchasing cannot write, the name, addition, and place of abode of such person being first written, such person shall set his or her name thereto, and the same shall be attested by such apothecary or druggist, or some other person present; and in case such apothecary or druggist shall not know the person buying to be of such name, or place of abode, then such apothecary or druggist shall not deliver such arsenic until it shall be certified to him by some person known to such apothecary or druggist, that the person buying is the same as he or she describes himself or herself to be; and in case any apothecary or druggist selling arsenic shall fail herein, he or she shall forfeit the sum of twenty pounds, to be recovered as herein after mentioned.