Referee's report by Edmund Taylor Whittaker, 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. Corrects some spellings of names, Elwin Bruno Christoffel and Pierre-Simon Laplace. 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. 29 December 1943