*** Letters, stating particulars and lowest price, _carriage free_, to be sent to MR. BELL, Publisher of "NOTES AND QUERIES," 186. Fleet Street. * * * * * Notices to Correspondents. NOTICES TO CORRESPONDENTS.--_In our early Numbers we inserted an address to Correspondents, in which we observed, "Correspondents will see, on a very little reflection, that it is plainly the Editor's interest to take all he can get, and make the most and the best of everything; and therefore he begs them to take for granted that their communications are received and appreciated, even if the succeeding Numbers bear no proof of it. He is convinced that the want of specific acknowledgment will only be felt by those who have no idea of the labour and difficulty attendant on the hurried management of such a work, and of the impossibility of sometimes giving an explanation, when there really is one which would quite satisfy the writer, for the delay or non-insertion of his communication. Correspondents in such cases have no reason, and, if they understood an Editor's position, they would feel that they have no right, to consider themselves undervalued: but nothing short of personal experience in editorship would explain to them the perplexities and evil consequences arising from the opposite course." We have thought well to repeat this general explanation because we have this week received two inquiries respecting the non-insertion of communications, neither party giving us his name nor the subject of the non-inserted communication._ H. H. H.'s (Ashburton) _letter has been forwarded to_ DR. DIAMOND. _It is not the first by many which we have received expressive of the writer's thanks for his valuable Photographic Papers._ ALPHA _complains in so generous a spirit that we regret we cannot agree with him. We assure him that, on the first point on which he writes, he is the only one who has so written, while we have had dozens of letters of thanks; and he will see in the present No._ (antè, p. 34.) _the value of the art recognised by a gentleman under whose notice it would probably never have been brought in a purely scientific journal. The second suggestion is one to which we, and many of our brethren of the Press, have turned our attention frequently, but hitherto unsuccessfully. The difficulties are greater than ALPHA imagines._ T. W. U. KEYE. _Will our Correspondent favour us with particulars?_ ENQUIRER _cannot do better than follow the directions for the Paper Process given by_ DR. DIAMOND _in our last Number. We hope soon to be able to give him satisfactory information on the other points of his communication_. THE INDEX AND TITLE-PAGE _to our Sixth Volume will be ready for delivery on Saturday next_. _A neat case for holding the Numbers of_ "NOTES AND QUERIES," _until the completion of each Volume, is now ready, price_ 1s. 6d., _and may be had, by order, of all Booksellers and Newsmen_.