I. W., active 1586

The copie of a letter sent by a learned physician to his friend : wherein are detected the manifold errors vsed hitherto of the apothecaries, in preparing their compositions, as sirropes, condites, conserues, pilles, potions, electuaries, losinges, &c: wherein also the reader shall finde a farre better manner how to preserue and correct the same.