Figure 1.

Three fragments of the original patient notes on the first phenylketonuria (PKU) patient treated, Sheila Jones. (Editorial note: as the name of this famous patient and her history are universally known, anonymization of the patient’s name in the records was considered pointless in this case and therefore omitted). Photographs are provided by Mr. Adams. Mr. Adams confirmed with Dr. John Gerrard that these case notes were made by him, including the handwriting. Gerrard confirmed that he had shared the notes with Dr. Robert Koch, and Mr. Adams found the notes when Jean Koch, the widow of Dr. Robert Koch, offered him the opportunity to peruse his files.