**George Keith Batchelor** (1920-2000) was a towering figure in fluid
mechanics and contributed profoundly to many of its subareas, among them the
theory of homogeneous turbulence and microhydrodynamics. As the founding
editor of the Journal of Fluid Mechanics, a position he held for more than
forty years, George exerted a profound influence on fluid dynamics and set
exacting standards. He founded and led for some thirty years the Department
of Applied Mathematics and Theoretical Physics at Cambridge, and made it
possible for generations of first-rate fluid dynamicists to come together.
George was instrumental in developing EUROMECH as a major force for
mechanics in Europe. A long list of monographs of great quality and
longevity emerged during his editorship for forty-five years of Cambridge
Monographs on Mechanics and Applied Mathematics.

**David George Crighton** (1942-2000) was an accomplished fluid
dynamicist with particular expertise in aeroacoustics and the interaction of
vortex flows with solid surfaces. He was admired for his applied mathematics
skills and for his leadership of the fluid dynamics community in the world
at large, within Cambridge in particular. In 1986, he became a professor of
applied mathematics at Cambridge and took over the headship of the
Department of Applied Mathematics and Theoretical Physics in 1991. He
succeeded George Batchelor as the editor of Journal of Fluid Mechanics, and
was the Master of Jesus College since 1997. David's cheerfulness, commitment
and continued hardwork, even while suffering from cancer for a year or so
before his untimely death, were phenomenal and universally admired.

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