Although Jenkins was the Locomotive Superintendent the early years of this period saw Hawkshaw specifying the locomotives.
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Other works that he undertook were the Barry Dock and Railway, and the Preston Dock, and in addition he carried out the contract for the Buenos Aires Harbour Works with John Hawkshaw and resident engineer James Murray Dobson.
He had a large office of his own in which he prepared the designs for the Stockton bridge for Charles Neate and Harrison Hayter, and designs of the ironwork of the lines and stations of the London underground District Railway extension to Whitechapel for Sir John Hawkshaw.