Having taken a picture, I note well the spot of some object near the centre of the picture: thus, if a window or branch of a tree be upon the spot where the lines cross [Cross lines], I remove the camera in a straight line about one foot for every ten yards distance from the subject, and bring the same object to the same spot: I believe it is not very important if the camera is moved more or less. This may be known and practised by many of your friends; but I am sure others make a great difficulty in effecting those satisfactory results which, as I have shown, may be so easily obtained. H. W. D. _Photographic Copies of MSS._--I am glad to find from your Notices to Correspondents in Vol. viii., p. 456., that the applicability of photography to the copying of MSS., or printed leaves, is beginning to excite attention. The facility and cheapness of thus applying it (as I have been informed by a professional photographer) is so great, that I have no doubt but that we shall shortly have it used in our great public libraries; so as to supersede the present slow, expensive, and uncertain process of copying by hand. And it is in order to help to bring about so desirable a state of things, that I send these few lines to your widely-circulated journal. M. D. * * * * * {502} Replies to Minor Queries. _Lord Cecil's "Memorials"_ (Vol. viii., p. 442.).--Cecil's "First Memorial" is printed in Lord Somers's _Tracts_. It appears that Primate Ussher, and, subsequently, Sir James Ware and his son Robert, had the benefit of extracts from Lord Burleigh's papers. MR. BRUCE may find the "Examination" of the celebrated Faithfull Comine, and "Lord Cecyl's Letters," together with other interesting documents, entered among the Clarendon MSS. in _Pars altera_ of the second volume of _Catal. Lib. Manuscr. Angl. et Hib._, Oxon. 1697. R. G. _Foreign Medical Education_ (Vol. viii., pp. 341. 398.).--In addition to the previous communications on this subject, I beg to refer your correspondent MEDICUS to Mr. Wilde's _Austria; its Literary, Scientific, and Medical Institutions, with Notes on the State of Science, and a Guide to the Hospitals and Sanitary Institutions of Vienna_, Dublin: Curry and Co., 1842. J. D. MCK.