Small clear glass bottle, with cork stopper and paper label, containing Brathwaite's Genuine Black Drop. Black Drop was a proprietary remedy of fermented vinegar of opium introduced around 1700. It contained more opium than most varieties of The label on this example reads 'Genuine Black Drop, Prepared By J.A. Brathwaite, Lancaster' and 'N.B. One Drop equal to four of Laudanum'.