Antique Organic Drug Guide 1916

Official United States Pharmacopoeia For the pharmacist on the run-a little hand size leather bound reminder of all they just learned! Columbia College students signed and dated 1923-1924 I'm pretty sure Agatha Christie owned one of these🤔 She worked in a pharmacy in the 30s. some of the binding has worn it's 108 years old! any questions please ask🙏