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Samuel Seaward (1800-1842), brother of John Seaward
1824 S. Seaward mentioned in connection with pressure gauges 
1828 Samuel Seaward, Canal Iron Works, Limehouse, Engineer, became a member of the Institution of Civil Engineers.
1843 Obituary 
Mr. Samuel Seaward, F.R.S., &C., was born at Lambeth in the year 1800, and at the age of fourteen years he entered the service of the East India Company as a midshipman; after his second voyage to Bombay and China he relinquished a naval career, and was placed by his brother as an apprentice with the late Henry Maudslay, in whose establishment he had the best opportunities of acquiring a practical knowledge of mechanics and engineering; of these opportunities he carefully availed himself, and always cherished a grateful recollection of his instructor.
After passing about five years with Mr. Maudslay, he entered the service of Taylor and Martineau, whence he proceeded to Cornwall, and assisted, under the direction of Arthur Woolf, in the erection of several large pumping engines; he then undertook the superintendence of part of the works of Mr. Harvey, at the Hayle Foundry, where he had the advantage of the instructions of Richard Trevithick.
In the year 1825 he returned from Cornwall and joined his brother, John Seaward, in the Canal Iron-works, Limehouse, as manufacturers of marine and other steam engines, as well as of general machinery.
The attention devoted by Mr. Seaward to the construction of marine engines particularly, and the successful adaptation of the 'direct action' engines - The engines of the 'Gorgon', the first of a numerous class of Government steamers fitted with that kind of engine, were built at the Canal Iron Works - (which were, it is believed, first introduced by Mr. Gutzmer, of Leith, on board the 'Tourist' steamer), are well known in the profession.
His ingenuity and mechanical talents are manifested in all the works undertaken by the firm to which he belonged, and by several scientific pamphlets which he published.
He joined the Institution in the year 1828, and became subsequently an active and useful Member of Council, and our Transactions are indebted to him for a memoir 'On the application of Auxiliary Steam Power to sailing vessels on long Voyages.'
Snatched from among us at the early age of forty-two years, the profession has lost an intelligent and zealous member, and his private friends a worthy and estimable man.