Many fragments of the coffers of the ceiling lie scattered about; they rested on marble joists, 15 inches and a half wide; the longest piece of these which we could find, is only 3 feet 11 inches in length, but this was a fragment. The depth being only 7 inches and a half, is not calculated for a beam of 20 feet, and they must therefore have rested on larger beams, but I cannot determine how the Propylæa were covered, or whether the central part was covered at all. Revett has given a section which includes the northern flank of the middle building, exhibiting the very curious manner in which the stones are arranged, as if they were cut away to make room for the roof of a side building, now destroyed. There are two cornices on this flank, one of which is continued from that of the outer portico; the lower is an internal one, that is, it is composed of such members as we find in Greek architecture to be appropriated to internal decoration. There are several other particulars relating to these side buildings, both remaining and destroyed, and to their union with the centre, but it would swell my letter to an essay, were I to enumerate them all, and besides, I have not the means of elucidating them satisfactorily. I will however, observe to you, that the flank wall on each side of the central building was carried up above the cornice of the wings, and these wings were not crowned with a pediment, but probably had a flat roof. The Propylæa are said to have cost 460,000_l._ a sum so enormous in proportion to the modern extent of the edifice, that some writers have supposed it must be meant to include the whole of the constructions of Pericles’s administration in the Acropolis. Buildings in marble will cost more than those of brick, even though the marble should be found in the vicinity; and if the distance to the Pentelic quarries was not great, yet the roads were bad; none of the modern expedients for facilitating transport were in use, and the expense must have been more than double what it would have been with us, with our taxes and turnpikes. Workmanship put together like the nicest operations in ivory, must also have cost very much more than the clumsy masonry of modern times; but after all these considerations, the sum still seems very great, even if we take into consideration that a great extent of subordinate edifices has disappeared.