It is an utter mistake to say that the ribs (_costoloni_) of St. Peter’s are seen in the great temple itself. The cupola which is seen inside is a second cupola, quite smooth, built on purpose to conceal the supports and ribs of the outer cupola, and these are seen only by persons who go to the top of that superb building, ascending between the two cupolas, the outer and inner one. 2nd.—As to the windows: Has any one ever seen such windows in a building, the whole character and style of which is so totally different from them in character and style? What will the effect be after having passed through the magnificent entrance of the Museum, to enter a room lighted not only by arched windows, but by windows with such ornaments in their upper portion, and then divided lengthways by a slender upright into two very narrow and very long arches, the proportions and frame of which are so peculiar, and so much at variance with everything else in the whole Museum? All the doors in the very room which is to be lighted by those windows are of simple and rectangular form. Will not this discordance produce a most disagreeable effect? I feel, perhaps, too strongly on the subject, and I most sincerely wish I may be mistaken, but I cannot, fearing strongly that this building, which I cherished the hope would prove as handsome as it will be useful, will thus be rendered subject to animadversion. I write under this conviction—under this conviction I spoke last Saturday to the Trustees. I shall claim no merit on the success; I must disclaim the responsibility of failure on these two points. Yours, &c., &c., A. PANIZZI.” Although, during the progress of the building, Panizzi had frequent occasion to complain of the short-comings of the workmen employed thereon, yet, the new Reading-Room was entirely finished by the end of April, 1857, in the laudably short space of less than three years. Much credit was due to the great energy of the contractor, Mr. Fielder, for whom Panizzi entertained the highest esteem, and who was untiring in his earnest endeavours in carrying out the plans of the architect; and on the 2nd of May in the same year, the building was duly opened, a grand breakfast being given at the British Museum in honour of the occasion: to this the Prince Consort had been invited by Panizzi, and had accepted the invitation, but was prevented from attending by an unforeseen occurrence. The following letter accounts for His Royal Highness’s absence from the ceremony:— “Piccadilly, April 30th, 1857. “My dear Sir,