Referee's report by Alexander Craig Aitken, on a paper 'On invariant theory under restricted groups' by D E Littlewood Sectional Committee: Mathematics Recommended for publication in the Philosophical Transactions of the Royal Society. The paper conclused the author's work on the subject. Refers to work of A Young. The work has 'high competence, but not brilliance'. Finds difficulty with the method. Contains extra question - 'Is there any information contained in the paper which likely to be of value to the enemy?' Referee replies no. [Published in the Philosophical Transactions of the Royal Society] No received date. 10 December 1943