of Chancery Lane, presumably patent agent.
1860 Patent on railway chairs; patent gained for foreign correspondents.
1860 Patent communicated to Mr Clark by James Hervey Deming, of Paris concerning prevention of the escape of oil from railway axle-boxes
1860 The invention of the Count Dehara, communicated to Mr. Clark of Chancery lone, relating to an apparatus for reducing the bulk of peat.
1864 Hydraulic Apparatus, communicated to Mr Clark - for report and illustration see page 258 of The Engineer 1864/04/29.
1864 An invention, patented by Mr. W. Clark, Chancery-lane, engineer, of a novel system of and mode of applying induction and eduction valves to water-pressure engines.
1866 Clark's improved combustion pump.
Was there a later connection with William Clark (Consulting) of 53 Chancery lane W.C.?