Letter from Lawrence Austin, Librarian, Insitute of Mining and Mechanical Engineers, Newcastle-upon-Tyne, to the Secretary of the Royal Society 'Dear Sir, I am in receipt of Volume LXXVIII., No. 526, of the Proceedings (biological Sciences), but you might kindly note that Nos. 524 and 525 have never yet come to hand, and as I am very desirous if you will be so good as to forward us these numbers. Thanking you in anticipation, I remain, Yours faithfully, Lawrence Austin'. 27 October 1906