Haulage on 1820s Railways

Rob Fallon recently told me of the online availability of the Franklin Institute Journal, including from the early 19th century when Erskine Hazard, an American civil engineer, visited NE England.   Some of his observations appeared on pages 275-7 of the Franklin Institute Journal of April 1827.   Apart from observations on how flanges interact with rails, an interesting conclusion which Hazard expounds is that stationary engine haulage is preferred to locomotives (on the Hetton Railway) because they do less damage to rails.   This is something that I had not previously considered, but very relevant in the days when steel had not yet replaced cast & wrought iron.