[Ms. letter] 1844 Jun [to] J. Field, Messrs. Maudsley [sic] & Field, Lambeth / I. K. Brunel. [Written from the Rattler? Asks costs of 'measuring screw' for measuring velocity of water 'in the deadwood'. Endorsed 'said about £50'. Holograph signed, 2p. on 1 leaf]
