"This paper establishes that there are serious problems with the hypothesis that the Victorian climacteric was driven by the decline phase of steam as a General Purpose Technology. This is primarily because steam’s contribution to industrial output and labour productivity growth was stronger after 1870 than before and that the non-steam-intensive sectors exhibited an inverted U-shape in trend output growth through the 19th century, experiencing a marked slowdown between 1830 and the 1870s. Seeking to base an account of 19th century British growth primarily on the implications of steam is thus misconceived."