Referee's report by Arthur Stanley Eddington, on a paper 'On the geometry of dynamics' by John Lighton Synge Sectional Committee: Mathematics Recommended for publication in the 'Philosophical Transactions of the Royal Society'. 'I think it would be difficult for the Society to refuse to print it, seeing that it is work of an original character on a classical problem and is I think carried out in a masterly way'. [Published in the Philosophical Transactions of the Royal Society A, 1927] Endorsed on verso as received 16 February 1926. [February 1926]