At the age of 13 , he was sent to Gresham 's School in Norfolk , where he remained from 1926 until 1931 , when he was 18 .
Maclean 's education began as a boarder at St Ronan 's School , Worthing .
At the age of 13 , Maclean was sent to Gresham 's School in Norfolk , where Maclean remained from 1926 until 1931 , when Maclean was 18 .
Maclean 's education began as a boarder at St Ronan 's School , Worthing .