| Description | Written from 69 Mornington Road, Regents Park, London. The letter claims that the screw for the Great Eastern Steam Ship infringes Griffith's patent of 1849 and asserts that Griffiths intends to claim a royalty if the screw is used. Griffiths reminds Brunel that they met during the period when Brunel was designing the ship and Griffiths gave Brunel details of his experiments and ideas. The letter regrets that, while Brunel used Griffiths' patent of 1849, he did not also use Griffiths' patent of 1853 for the method of fastening the screw blades to the boss, which he believes is far less liable to give way than the method Brunel adopted. |