OTTEWILL'S Registered Double Body Folding Camera, adapted for Landscapes or Portraits, may be had of A. ROSS, Featherstone Buildings, Holborn; the Photographic Institution, Bond Street; and at the Manufactory as above, where every description of Cameras, Slides, and Tripods may be had. The Trade supplied. * * * * * PHOTOGRAPHIC APPARATUS, MATERIALS, and PURE CHEMICAL PREPARATIONS. KNIGHT & SONS' Illustrated Catalogue, containing Description and Price of the best forms of Cameras and other Apparatus. Voightlander and Son's Lenses for Portraits and Views, together with the various Materials, and pure Chemical Preparations required in practising the Photographic Art. Forwarded free on receipt of Six Postage Stamps. Instructions given in every branch of the Art. An extensive Collection of Stereoscopic and other Photographic Specimens. GEORGE KNIGHT & SONS, Foster Lane, London. * * * * * Important Sale by Auction of the whole of the remaining Copies of that splendid National Work, known as "FINDEN'S ROYAL GALLERY OF BRITISH ART," the engraved Plates of which will be destroyed during the Progress of the Sale, and in the presence of the Purchasers. SOUTHGATE & BARRETT have received instructions from MR. HOGARTH, of the Haymarket, to Sell by Public Auction at their Fine Art and Book Auction Rooms, 22. Fleet Street, London, on Wednesday Evening, June 7th, and following Evenings, THE WHOLE OF THE REMAINING COPIES Of the very Celebrated Work, known as FINDEN'S ROYAL GALLERY OF BRITISH ART, Consisting of a limited number of Artists' and other choice proofs, and the print impressions, which are all in an exceedingly fine state. The work consists of 48 plates, the whole of which are engraved in line by the most eminent men in that branch of art, and the pictures selected will at once show that the great artists--Turner, Eastlake, Landseer, Stanfield, Webster, Roberts, Wilkie, Maclise, Mulready, and more than thirty other British Masters, are represented by the works which established and upheld them in public favour, and by themes which appeal to universal sympathy and happiest affections, or which delineate the peculiar glories of our country, and commemorate its worthiest and most honourable achievements. The attention of the public is also particularly directed to the fact that ALL THE ENGRAVED PLATES from which the impressions now offered have been taken, WILL BE DESTROYED IN THE PRESENCE OF THE PURCHASERS, at the time of Sale. By thus securing the market from being supplied with inferior impressions at a future time, and at a cheaper rate, the value of the existing stock will be increased, and it will become the interest of all who wish to possess copies of these eminent works of art, at a reduced price, to purchase them at this Sale, which will be THE ONLY OPPORTUNITY of obtaining them.