When I first saw information on Scherman's Steam Man (2004), there was very little information about him. Scherman worked for Disney, and was the definitive person on Disney's Nautilus. His concept for a steam man is amazing.
A Vernian enthusiast posted some images (flickr) found in Scherman's friend Kendall roundhouse., also showing a pin-up board of his inspiration, Reade's Fictional Steam Man of the Prairies 1868 (not 1841 or 1892 as read in the images [although 1892 might be a re-issue date]).
A more recent article suggests that the Steam Man, referred to as the Iron Man, was proposed to Disney for a TV series around Nemo and Nautilus 2 (that Scherman had modelled). The Iron Man was to cart supplies around Vulcania.
Above 2 photographs property of John Patrick Burke (as per article).
For the full article and other wonderful articles around Scherman, see here.