Lewis Carroll (1832-98) is celebrated around the world as one of the great purveyors of ‘literary nonsense’: his books Alice’s Adventures in Wonderland (1865) and Through the Looking-Glass (1871) have entertained countless readers since they were published nearly 150 years ago. For many, the name ‘Lewis Carroll’ is synonymous with children’s literature.

But ‘Lewis Carroll’ was really a man named Charles Lutwidge Dodgson, a mathematician at Christ Church, Oxford. As such, he led something of a double life: to the readers of his Alice books he was Lewis Carroll, while to the world of mathematics and to his colleagues at the University of Oxford he was (Reverend) Charles Lutwidge Dodgson, a man who formed his pen name by reversing his first two names (‘Charles Lutwidge’ became ‘Lewis Carroll’).

There is a famous anecdote about Carroll and Queen Victoria. Victoria enjoyed Alice’s Adventures in Wonderland so much that she requested a…