Henderson had a thousand times more to do with the discovery of insulin than had Macleod. In the first place, he knew more about it. In the second place, he was consulted before every series of experiments, and he advised, criticized, or commended.

On February 19th, Dr. Collip found that he was unable to refine the extract by his method and was unable to keep up his supply to the wards. During the following six weeks, or longer, no extract was available for clinical tests. I believe the reason for this to be that Collip, wishing to keep his process a secret, had not kept careful records.

Professor Macleod, in his remarks, gave everything that I was going to say and used the pronoun 'we' throughout. The following day, students were talking about the remarkable work of Professor Macleod.

Frederick Banting Quotes