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Henry Rowles ( -c1840)
1838 Henry Rowles of Stratton Street, became a member of the Institution of Civil Engineers.
1841 Obituary 
Henry Rowles, the Chairman of the Rhymney Iron Works, was educated in the office of his relative, Mr. H. Holland, the architect, on quitting which he entered into business as a builder.
He was engaged among other extensive undertakings in building several of the East India Company's Warehouses, the Royal Mint, the Excise Office, and Drury Lane Theatre.
He was an active Director in several Docks, Railway, and other Companies, and finally became Managing Director of the Rymney Iron Works, in the active discharge of the duties of which office he continued until his death.
The Institution owes to him the Drawings of the Iron Works made by Mr. Richards.