The work hangs in the lobby of the Alan Mason Chesney Medical Archives at Johns Hopkins. While working with Olaf S. Rask ten years before he retired, McCollum began to search for ways to separate specific amino acids from protein hydrolysates. When he retired, he worked on this project exclusively. He had a small laboratory at Johns Hopkins's Homewood Campus and an assistant, Mrs.Agatha Ann Rider. In retirement, he produced six papers and three patents, the last one issued to him and Rider on March15, 1960, for the purification of glutamine. In 1961 he was elected a foreign member of the Royal Society. In 1965 the University of Kansas named a ten-story dormitory, McCollum Hall, after McCollum and his brother Burton. The building housed about nine hundred students for fifty years until it was demolished in 2015. Each of them sat for a portrait painted by Kansas artist Daniel MacMorris. The portraits hung side by side in the foyer. After the demolition, McCollum's portrait was moved to the School of Pharmacy, and Burton's went to the Kansas Geological Survey. One issue became especially important to him, and he wrote dozens of his friends asking what could be done about it. He thought the country was losing its potassium and phosphorus, and he wanted to find a way to recycle them instead of throwing them in our sewage. In 1965 he and his wife traveled so he could speak at the fiftieth anniversary of the appointment of Agnes Fay Morgan to the faculty of the University of California, Berkeley. The following year, he was unable to attend the 100th anniversary of the University of Kansas in 1966 because of physical disability. His house in Baltimore was broken up into apartments but nevertheless became a National Historic Landmark. The American Society for Nutrition offers a McCollum lectureship. McCollum died on November 15, 1967, at the age of 88. Shortly before his death, he remarked: "I have had an exceptionally pleasant life and am thankful." Posthumous controversy In her 1994 biography of Cornelia Kennedy for the Journal of Nutrition, former University of Minnesota graduate dean Patricia B. Swan writes "forgotten...are the women who worked with Elmer V. McCollum throughout his outstanding research career." In his editor's note, Thomas Jukes adds, "I would hope this is not the case." Johns Hopkins professor Richard David Semba has written extensively on vitaminA. His 2012 paper The