 The third Act, on 27 June 1834, authorised a further £54,875 to build branches to Fisherrow, and "allowing a certain amount of passenger traffic by horse-drawn railway coaches".The line was designed by James Jardine, its engineer from 1826; the company's manager David Rankine also had an engineering role from the mid-1830s.The railway was a public company, but the five coal-owners who would benefit from the line were the dominant shareholders