)
)
)
)
)
)
On a train in Switzerland
)
At the summit of Harter Fell
)
At the 1926 EMS colloquium in St Andrews
)
At the 1930 EMS colloquium in St Andrews
)
At the 1934 EMS colloquium in St Andrews
)
At the 1938 EMS colloquium in St Andrews
)
At the 1951 EMS colloquium in St Andrews
At the 1955 EMS colloquium in St Andrews