Lieut.-Colonel Stanley Casson

Lieut.-Col. J. C. Robertson

Lieut.-Genl. Sir William Leishman

K.C.B., K.C.M.G., M.B., F.R.C.P., F.R.S., IX.D., K.H.P., Dircctor-Gencral, Army Medical Scrvicc. The scientific world, the medical profession and the Royal Army Medical Corps sustained a great loss when on June 2nd, of this year Sir William Leishman died after a short illness. William Boog Leishman was born on November 6th, 1865; he was the son of Dr. William Leishman a professor of midwifery a...

Colonel D. F. Keegan

Lieut.-Col. Robert Knowles

Bing Topology & Casson Handles

In 1914, the 1-dimensional case of the conjecture was proven in full generality by Caratheodory and Osgood-Taylor using elaborate methods from complex analysis. The 2-dimensional case was studied in the 1920s by Alexander who first circulated a manuscript claiming a proof but soon discovered a counterexample himself, the famous horned sphere. Later Alexander found an extra condition under which...