Two copies of the book (one typed, one hand-written), which deals with the history of the steam locomotive from 1803 until the time of writing, looking at the technological developments as well as the effects of the locomotive on civilisation. The file also includes correspondence between Holcroft and his publisher concerning his unsuccessful request that the book be published, along with a diagram showing the chronology of railway history that Holcroft's book covers in relation to his own career.