Edward Jenner vaccinating patients in the Smallpox and Inoculation Hospital at St. Pancras: the patients develop features of cows.

Patients are spoon-fed "opening mixture" as they come through the door. A boy standing next to Jenner is holding a pot labelled "vaccine pock hot from ye cow", on his jacket is a badge saying "Pancras" and in his pocket a paper entitled "Benefits of the vaccine process"