Correspondence regarding Barnes Wallis' biography, Jan 1972

Correspondence regarding Barnes Wallis' biography, 1970

Correspondence with Professor Jack Morpurgo, author of Barnes Wallis' biography

Correspondence regarding Barnes Wallis' biography, Jul - Dec 1971

Correspondence regarding Barnes Wallis' biography, Aug - Dec 1972

Correspondence regarding Barnes Wallis' biography, Nov 1968 - Dec 1969

Correspondence regarding Barnes Wallis' biography,1973-1974

Correspondence regarding Barnes Wallis' biography, Jan - Jun 1971

Correspondence regarding Barnes Wallis' biography, Feb - Jun 1972