Famous for his development of the steam hammer, the engineer James Hall Nasmyth (1808–1890), after retiring at the age of 48 years old, pursed his hobby of astronomy. As well as building his own 20-inch reflecting telescope and so inventing the "Nasmyth focus", he co-wrote The Moon: Considered as a Planet, a World, and a Satellite (1873). The image here is one a several featured in the book. (Image source: Rijksmuseum)