Who did it?—It was done at the expense of the commissioners for watching and paving, at my wish, and I certainly did superintend it, though I had nothing to do with it more than any other commissioner had. It is a street many gentlemen know very well; it is a public road from Bristol to the Park, and very steep; I believe it is a rise of three inches in a yard, and when paved was so very dangerous and slippery that many accidents arose from it, and now it is a very good road indeed, and I do not believe that it cost upon an average, since that alteration, more than one fourth of what it used to do. What stone was it paved with before?—Black rock-stone, a species of limestone. APPENDIX. APPENDIX (B.) MEMORANDUM of Mr. Johnson, respecting the Roads under Mr. MᶜAdam’s superintendence. As I travel rapidly over great distances, and my attention is usually much occupied with the immediate business of the office, I cannot speak with accuracy about particular and local alterations. But I feel myself well warranted in stating, that whenever I have found any thing done under Mr. MᶜAdam’s immediate direction, or by his pupils, or even in imitation of his plan and principles, the improvement has been most decisive, and the superiority over the common method of repairing roads, most evident; and, as superintendent of mailcoaches, I have abundant reason to wish that Mr. MᶜAdam’s principles were acted upon very generally. If they were, a pace, which in winter or any bad weather cannot be accomplished without difficulty, would become perfectly easy, to say nothing of the comfort and safety of the traveller, and the credit to humanity in lessening the hard labour of the animals. I may add, that although so much has been accomplished, the postmaster general could still expedite the conveyance of the mails, and bring the arrangements of the posts nearer to perfection, if the roads were universally as much improved as the practice of Mr. MᶜAdam’s plan would effect. CHAS. JOHNSON. _General Post-office, Dec. 8, 1819._ P.S. As one instance of the benefit of Mr. MᶜAdam’s improvement, I beg to mention that the _mail last winter lost ten, fifteen, and twenty minutes, in passing from Staines to Bagshot_, but now the time is _exactly kept_. C. J. APPENDIX (C.) LETTER from Postmaster General to the Lords of the Treasury; dated 20th December 1819. To the Right Hon. the Lords Commissioners of His Majesty’s Treasury. My Lords,