[Sir Marc Isambard Brunel, civil engineer.] Autograph Letter Signed ('Mc Id Brunel') to William Horsley, regarding 'an order for your party to see the Shield' and 'the removal of every thing on the opposite Side' of the Thames Tunnel.

Sir Marc Isambard Brunel (1769-1849), civil engineer who constructed the Thames Tunnel with his son Isambard Kingdom Brunel (1806-1859)
Publication details: 
'Y Tunnel 2d July 40' [London, 1840.]
SKU: 22335

1p, 12mo. Laid down on a piece of paper cut from an album, the mount having 'Sir Isambard Brunel' written on it in a Victorian hand. In good condition, lightly aged and worn. Reads: 'My dear Sir, | I inclose you an order for your party to see the Shield. I cannot possibly engage to see them, as my time is more than ever uncertain on this side [last two words underlined] | We are so busy in preparing for the removal of every thing on the opposite Side, that I cannot command any particular hour of the days, for a week to come. | I am my dear Sir Yours faithfully | Mc Id Brunel'. With Brunel's customary florid signature, followed as usual by three dots between two lines. The 'Id' of the signature more lightly inked than the rest. The Thames Tunnel was the first tunnel to be built under a river. It is still in use, as part of the London Overground railway system. Brunel developed the first successful rectangular tunnelling shield, and patented it with Lord Cochrane in January 1818.