Referee's report by Geoffrey Ingram Taylor, on a paper 'VI. The natural frequencies of systems having restricted freedom' by Anne Pellew and Richard Vynne Southwell Sectional committee: Engineering Recommended for publication in Proceedings. As most readers of the paper will already be familiar with the previous papers in the series, there is no need to repeat the foundations of the subject. [Published in Proceedings of the Royal Society A, 1940]. Endorsed on verso as received 23 February 1940. February 1940