I infer from General Casey's drawings, accompanying Mr. Corcoran's letter, that the plan of a sort of temple-like excrescence from the base--a highly objectionable feature--is abandoned. It is curious that we do not know precisely what the Egyptian form of the base was. Some authorities state it was a die of larger dimensions than the shaft, and with sides battering at the same rate as the shaft, but I do not find satisfactory evidence that this was by any means universal, though it would certainly be an appropriate and harmonious form. Of course any desirable base can be constructed around the shaft. There are obelisks the surface of which indicates that they were stuccoed, and this suggests that if the shaft of the Washington obelisk shall from time or difference of material be found parti-colored, surface uniformity of tone may be obtained by the same process. We have no knowledge of any Egyptian obelisk much exceeding one hundred feet in height, though some writers speak of such monuments of considerably greater dimensions. The extreme difficulty of obtaining monoliths exceeding one hundred feet renders it probable that the measurements of the authorities referred to were mere vague estimates rather than ascertained dimensions. * * * * * Yours truly, GEO. P. MARSH. BROOKLINE, MASS., _August 1, 1878_. MY DEAR SIR: Your favor of the 20th ultimo reached me yesterday. I thank you for sending me the copy of Mr. Story's letter, which I have read with great interest. I am only a second vice-president of the Monument Association, and am not included in the commission for completing the work. I had no part or lot in the original design of the Monument. * * * As an original question, I might have desired a different design; and I had no small part in inducing the building committee, many years ago, to omit the pantheon at the base, and to confine the design to a simple obelisk. After that was arranged, and when the Monument had reached so considerable a height, I was very averse to changing the plan. A whole generation of men, women, and children had contributed, in larger or smaller sums, to this particular Monument; and States, cities, and foreign nations had sent stones for its completion. To tear it all down, with a view to improve the design, was abhorrent to me. Story called to see me when he was in Boston, and I told him that, so far as I was concerned, my first wish was to finish the Monument as a simple obelisk; but that, if a change was unavoidable, owing to any insecurity of the foundations, his idea of turning it into an ornamental Lombard Tower was the best plan I had seen suggested. * * *