Sir David Mason has written of Fergus:

Oswald Fergus came from a well-known Scottish medical family. His father, Andrew Fergus, was President of the Faculty of Physicians and Surgeons of Glasgow from 1874-1877 and again from 1883-1886, and he had two brothers, each of whom became President. Andrew Freeland Fergus the older brother, a renowned ophthalmologist, was President from 1918-1921 and John F. Fergus, a younger brother and a distinguished physician, from 1929-1931.

So to the unique record of the achievements of this distinguished family should be added the outstanding contribution of Edward Oswald Fergus - pioneer of simulated clinical dental practice in dental education.

After he had presented the model at other meetings in London and Edinburgh, he offered C. Ash and Sons the phantom under certain conditions, which they accepted. These included that it be acknowledged as his, that his agreement be sought to any major changes, and that he would not gain financially from the invention.

In 1898 when the firm advertised in their German journal a similar dummy patented by Herr Weiss in Austria, an action which was queried by Fergus, they wrote back 'Your own phantom has become so widely known that it must be obvious to everyone that you are the originator of the idea'. Since Fergus' day, simulated clinical dental teaching has developed and the phantom head, which has undergone many refinements, remains an essential component of dental education and training internationally.