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Joseph Hersey Pratt was born on December 5, 1872, in North Middleborough, Massachusetts.
He was an American physician and author. He studied at Yale, Harvard Medical School and Johns Hopkins Medical School (M.D., 1898) in Baltimore, where he met and was mentored by Dr. William Osler (1849–1919). In 1902, Pratt spent half a year in the medical clinic of Professor Ludolph Krehl (1861–1937), specialist of the psychosomatic aspects of human illnesses, at Tübingen and at the University of Heidelberg, Germany. Upon his return, he hoped to combine clinical medicine with laboratory research. He opened a small consulting practice in Boston, while working as a low-paid medical clinic assistant at the Massachusetts General Hospital. In 1905, following Dr. Osler’s suggestion, Pratt began a home-treatment programme that included weekly group meetings. In 1927, he became the Medical Director of the Boston Dispensary. Pratt made two significant contributions to American medicine: he originated the medical practice of group therapy; and he helped establish Boston's New England Medical Center. He is the author of several books, e.g., "A Year with Osler, 1896-1897" (1949) and "Fifty Years in Group Psychotherapy, Commemorating the Pioneering of Joseph Hersey Pratt, M.D., 1905-1955" (1955). He also published numerous articles in various medical journals.
In 1909, he married Rosamond Means Thomson (1884–1949). He died on March 3, 1956, in Boston, Massachusetts.
Dr. Powles was born in Japan and received his early education there privately. Subsequently he moved to Montreal and continued his education there. He received a B.A. degree from McGill in 1940 followed by a M.D.C.M., also from McGill, in December of 1943. From 1944 to 1946 he served in the Canadian Army Medical Corp. In 1952 he completed his diploma in Medicine. By 1990 he held the position of Professor Emeritus in Psychiatry at Queen's University, Kingston, Ontario.
Eileen Edna Le Poer Power (married name Postan) was born on January 9, 1889, in Altrincham, Cheshire, England.
She was a British economic historian, medievalist, educator, and author. She was educated at Oxford High School for Girls and Girton College, Cambridge (1907-1910). In 1910, she was awarded the Gilchrist research fellowship and studied at the University of Paris and the École des Chartes. On her return to Britain, she was awarded the Shaw research studentship at the London School of Economics (1911–1913), where she studied medieval women. Power became Director of Studies in History at Girton College, University of Cambridge (1913–1921), Lecturer in Political Science at the London School of Economics (1921–1924), and Reader of the University of London (1924–1931). Power visited India, China and Japan after she became the first woman to be was awarded the Albert Kahn travelling scholarship in 1920. In 1931, she became the second woman to be appointed to the Chair of Economic History at the London School of Economics. She was the author of many books, e.g., "Medieval English Nunneries" (1922) and "Medieval People" (1924). Several of her lectures were edited by her husband, Michael M. Postan, and published as "Medieval Women" in 1975.
In 1937, she married Mikhail Moissey Postan (1898–1981). She died on August 8, 1940, in London, England.