| Description | Letter from Isambard Kingdom Brunel to Thames Tunnel Directors including Sir Marc Brunel's and Brunel's report on Donkin's proposals, concerning their satisifaction with the state of the Thames Tunnel works, but criticism of defective pumps and recommendation for independent secondary pumping apparatus, 28 May 1844
Letter from Isambard Kingdom Brunel to J. Field regarding the Rattler Steamship, including request for estimate of cost of screw for measuring velocity of water in the deadwood, readiness of new screw, 3 June 1844 |