Bb. (Bradford) _will probably find in the _Journal of a Naturalist_, White's _Selborne_, and the valuable series of works illustrative of the _Natural History of England_, published by Van Voorst of Paternoster Row, the materials of which he stands in need, and references to other authorities._ C. R. _will find scattered through our Volumes many modern instances of the _mode of discovering the drowned_, to which his communication refers._ ABHBA. _Our Correspondent should procure a valuable tract, entitled _"An Argument for the Greek Origin of the Monogram IHS,"_ published by the Cambridge Camden Society (Masters), which clearly shows that this symbol is formed out of the first two and the last letter of the Greek word_ [Greek: IÊSOUS]. P. H. F. _The communication forwarded on "_Lines attributed to Hudibras_," will be found in our_ 1st Volume, p. 210. F. T. _The _Weekly Pacquet_ and the _Popish Courant_ is one and the same periodical, the latter being merely an appendix to the former, and printed continuously, as shown by the running paginal figures; so that when Chief Justice Scroggs prohibited the publication of the former, he at the same time suppressed the latter._ A BEGINNER. _We again repeat that we cannot point out particular warehouses for the purchase of photographic materials. Our advertising columns will show where they are to be purchased at every variety of price._ C. K. P. (Newport). _From the specimen forwarded, we doubt whether the paper is Turner's; if it is, it is not his desirable make. The negative it is evident, from its redness and want of gradation of tint throughout, has been far too long exposed. We have seen the brown spots complained of occur when the paper has been too long excited before use._ E. Y. (Rochester). _It is probable that the spot of which you complain is from light reflected from the bottom of the camera, not from the interior of the lens. If so, the application of a piece of black velvet would remedy this. As the spot is always is one place, it must depend upon light reflected from some one spot._ M. DE S. (Tendring). _We trust to be able to send a very satisfactory reply in the course of a few days. We have delayed answering only from a desire to accomplish our Correspondent's object._ OUR EIGHTH VOLUME _is now bound and ready for delivery, price 10s. 6d., cloth, boards. A few sets of the whole Eight Volumes are being made up, price 4l. 4s.--For these early application is desirable._ "NOTES AND QUERIES" _is published at noon on Friday, so that the Country Booksellers may receive Copies in that night's parcels, and deliver them to their Subscribers on the Saturday._ * * * * * VALUABLE PATRISTICAL WORKS RECENTLY PUBLISHED IN GERMANY.